1021012021120 has 128 divisors (see below), whose sum is σ = 3004131695040. Its totient is φ = 323133456384.

The previous prime is 1021012021111. The next prime is 1021012021129. The reversal of 1021012021120 is 211202101201.

1021012021120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1021012021111) and next prime (1021012021129).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 1021012021120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021012021129) 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, 8707317 + ... + 8823796.

Almost surely, 2^{1021012021120} is an apocalyptic number.

1021012021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021012021120 is an abundant number, since it is smaller than the sum of its proper divisors (1983119673920).

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

1021012021120 is a wasteful number, since it uses less digits than its factorization.

1021012021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17531152 (or 17531140 counting only the distinct ones).

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

Adding to 1021012021120 its reverse (211202101201), we get a palindrome (1232214122321).

The spelling of 1021012021120 in words is "one trillion, twenty-one billion, twelve million, twenty-one thousand, one hundred twenty".