121212112120 has 64 divisors (see below), whose sum is σ = 297561794400. Its totient is φ = 44071034880.

The previous prime is 121212112103. The next prime is 121212112121. The reversal of 121212112120 is 21211212121.

It is a super-2 number, since 2×121212112120² (a number of 23 digits) contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121212112094 and 121212112103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212112121) 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, 4252476 + ... + 4280884.

Almost surely, 2^121212112120 is an apocalyptic number.

121212112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212112120 is an abundant number, since it is smaller than the sum of its proper divisors (176349682280).

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

121212112120 is a wasteful number, since it uses less digits than its factorization.

121212112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38128 (or 38124 counting only the distinct ones).

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

Adding to 121212112120 its reverse (21211212121), we get a palindrome (142423324241).

It can be divided in two parts, 121212 and 112120, that added together give a palindrome (233332).

The spelling of 121212112120 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty".