1210111002120 has 128 divisors (see below), whose sum is σ = 3728919680640. Its totient is φ = 313935206400.

The previous prime is 1210111002109. The next prime is 1210111002143. The reversal of 1210111002120 is 212001110121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1210111002096 and 1210111002105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55369195 + ... + 55391045.

It is an arithmetic number, because the mean of its divisors is an integer number (29132185005).

Almost surely, 2^{1210111002120} is an apocalyptic number.

1210111002120 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 1210111002120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1864459840320).

1210111002120 is an abundant number, since it is smaller than the sum of its proper divisors (2518808678520).

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

1210111002120 is a wasteful number, since it uses less digits than its factorization.

1210111002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34375 (or 34371 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1210111002120 its reverse (212001110121), we get a palindrome (1422112112241).

The spelling of 1210111002120 in words is "one trillion, two hundred ten billion, one hundred eleven million, two thousand, one hundred twenty".