1021136157 has 24 divisors (see below), whose sum is σ = 1508483808. Its totient is φ = 665431200.

The previous prime is 1021136111. The next prime is 1021136167. The reversal of 1021136157 is 7516311201.

1021136157 is a `hidden beast` number, since 10 + 21 + 13 + 615 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1021136157 is a prime.

It is a super-2 number, since 2×1021136157² = 2085438102265457298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1021136157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021136167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83782 + ... + 95192.

It is an arithmetic number, because the mean of its divisors is an integer number (62853492).

Almost surely, 2^1021136157 is an apocalyptic number.

It is an amenable number.

1021136157 is a deficient number, since it is larger than the sum of its proper divisors (487347651).

1021136157 is a wasteful number, since it uses less digits than its factorization.

1021136157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11641 (or 11638 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1021136157 is about 31955.2211226898. The cubic root of 1021136157 is about 1006.9963229782.

Adding to 1021136157 its reverse (7516311201), we get a palindrome (8537447358).

The spelling of 1021136157 in words is "one billion, twenty-one million, one hundred thirty-six thousand, one hundred fifty-seven".