121212010120 has 64 divisors (see below), whose sum is σ = 289272772800. Its totient is φ = 45582301440.

The previous prime is 121212010111. The next prime is 121212010141. The reversal of 121212010120 is 21010212121.

It is a self number, because there is not a number n which added to its sum of digits gives 121212010120.

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, 509179 + ... + 708298.

It is an arithmetic number, because the mean of its divisors is an integer number (4519887075).

Almost surely, 2^121212010120 is an apocalyptic number.

121212010120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212010120 is an abundant number, since it is smaller than the sum of its proper divisors (168060762680).

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

121212010120 is a wasteful number, since it uses less digits than its factorization.

121212010120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217638 (or 1217634 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121212010120 its reverse (21010212121), we get a palindrome (142222222241).

The spelling of 121212010120 in words is "one hundred twenty-one billion, two hundred twelve million, ten thousand, one hundred twenty".