1021125056 has 56 divisors (see below), whose sum is σ = 2437668480. Its totient is φ = 414588672.

The previous prime is 1021125031. The next prime is 1021125071. The reversal of 1021125056 is 6505211201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

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, 51470 + ... + 68493.

Almost surely, 2^1021125056 is an apocalyptic number.

1021125056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1021125056 is an abundant number, since it is smaller than the sum of its proper divisors (1416543424).

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

1021125056 is a wasteful number, since it uses less digits than its factorization.

1021125056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120001 (or 119991 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1021125056 is about 31955.0474260327. The cubic root of 1021125056 is about 1006.9926738707.

Adding to 1021125056 its reverse (6505211201), we get a palindrome (7526336257).

The spelling of 1021125056 in words is "one billion, twenty-one million, one hundred twenty-five thousand, fifty-six".