1210121212120 has 64 divisors (see below), whose sum is σ = 2761193111040. Its totient is φ = 477241968000.

The previous prime is 1210121212117. The next prime is 1210121212127. The reversal of 1210121212120 is 212121210121.

It is a super-4 number, since 4×1210121212120⁴ (a number of 49 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210121212094 and 1210121212103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210121212127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1258945 + ... + 2001295.

It is an arithmetic number, because the mean of its divisors is an integer number (43143642360).

Almost surely, 2^{1210121212120} is an apocalyptic number.

1210121212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210121212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1380596555520).

1210121212120 is an abundant number, since it is smaller than the sum of its proper divisors (1551071898920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1210121212120 is a wasteful number, since it uses less digits than its factorization.

1210121212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742936 (or 742932 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1210121212120 its reverse (212121210121), we get a palindrome (1422242422241).

It can be divided in two parts, 1210121 and 212120, that added together give a palindrome (1422241).

The spelling of 1210121212120 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty".