121012001220 has 96 divisors (see below), whose sum is σ = 369754721280. Its totient is φ = 29326872960.

The previous prime is 121012001213. The next prime is 121012001237. The reversal of 121012001220 is 22100210121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121012001196 and 121012001205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2162919 + ... + 2218161.

It is an arithmetic number, because the mean of its divisors is an integer number (3851611680).

Almost surely, 2^121012001220 is an apocalyptic number.

121012001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012001220 is an abundant number, since it is smaller than the sum of its proper divisors (248742720060).

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

121012001220 is a wasteful number, since it uses less digits than its factorization.

121012001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58585 (or 58583 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121012001220 its reverse (22100210121), we get a palindrome (143112211341).

The spelling of 121012001220 in words is "one hundred twenty-one billion, twelve million, one thousand, two hundred twenty".