1210121011212 has 192 divisors, whose sum is σ = 3017456332800. Its totient is φ = 376782658560.

The previous prime is 1210121011193. The next prime is 1210121011213. The reversal of 1210121011212 is 2121101210121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1210121011191 and 1210121011200.

It is not an unprimeable number, because it can be changed into a prime (1210121011213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1194590818 + ... + 1194591830.

It is an arithmetic number, because the mean of its divisors is an integer number (15715918400).

Almost surely, 2^{1210121011212} is an apocalyptic number.

1210121011212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1210121011212 is an abundant number, since it is smaller than the sum of its proper divisors (1807335321588).

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

1210121011212 is a wasteful number, since it uses less digits than its factorization.

1210121011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696 (or 1694 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1210121011212 its reverse (2121101210121), we get a palindrome (3331222221333).

The spelling of 1210121011212 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, eleven thousand, two hundred twelve".