1021021012120 has 32 divisors (see below), whose sum is σ = 2297975051520. Its totient is φ = 408287911680.

The previous prime is 1021021012051. The next prime is 1021021012153. The reversal of 1021021012120 is 212101201201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021021012120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3628077 + ... + 3899356.

It is an arithmetic number, because the mean of its divisors is an integer number (71811720360).

Almost surely, 2^{1021021012120} is an apocalyptic number.

1021021012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021021012120 is an abundant number, since it is smaller than the sum of its proper divisors (1276954039400).

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

1021021012120 is a wasteful number, since it uses less digits than its factorization.

1021021012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530835 (or 7530831 counting only the distinct ones).

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

Adding to 1021021012120 its reverse (212101201201), we get a palindrome (1233122213321).

The spelling of 1021021012120 in words is "one trillion, twenty-one billion, twenty-one million, twelve thousand, one hundred twenty".