121112212120 has 16 divisors (see below), whose sum is σ = 272502477360. Its totient is φ = 48444884832.

The previous prime is 121112212099. The next prime is 121112212153. The reversal of 121112212120 is 21212211121.

It is a junction number, because it is equal to n+sod(n) for n = 121112212094 and 121112212103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513902612 + ... + 1513902691.

It is an arithmetic number, because the mean of its divisors is an integer number (17031404835).

Almost surely, 2^121112212120 is an apocalyptic number.

121112212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112212120 is an abundant number, since it is smaller than the sum of its proper divisors (151390265240).

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

121112212120 is a wasteful number, since it uses less digits than its factorization.

121112212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027805314 (or 3027805310 counting only the distinct ones).

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

Adding to 121112212120 its reverse (21212211121), we get a palindrome (142324423241).

Subtracting from 121112212120 its reverse (21212211121), we obtain a palindrome (99900000999).

The spelling of 121112212120 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, one hundred twenty".