121212021112120 has 64 divisors (see below), whose sum is σ = 284591215203840. Its totient is φ = 46375718928000.

The previous prime is 121212021112111. The next prime is 121212021112139. The reversal of 121212021112120 is 21211120212121.

It is a happy number.

It is a super-2 number, since 2×121212021112120² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39603565 + ... + 42554275.

It is an arithmetic number, because the mean of its divisors is an integer number (4446737737560).

Almost surely, 2^{121212021112120} is an apocalyptic number.

121212021112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212021112120 is an abundant number, since it is smaller than the sum of its proper divisors (163379194091720).

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

121212021112120 is a wasteful number, since it uses less digits than its factorization.

121212021112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995396 (or 2995392 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121212021112120 its reverse (21211120212121), we get a palindrome (142423141324241).

The spelling of 121212021112120 in words is "one hundred twenty-one trillion, two hundred twelve billion, twenty-one million, one hundred twelve thousand, one hundred twenty".