1011156220631 has 4 divisors (see below), whose sum is σ = 1043774163264. Its totient is φ = 978538278000.

The previous prime is 1011156220609. The next prime is 1011156220639. The reversal of 1011156220631 is 1360226511101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1011156220631 - 2²² = 1011152026327 is a prime.

It is a super-2 number, since 2×1011156220631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011156220594 and 1011156220603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011156220639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16308971270 + ... + 16308971331.

It is an arithmetic number, because the mean of its divisors is an integer number (260943540816).

Almost surely, 2^{1011156220631} is an apocalyptic number.

1011156220631 is a deficient number, since it is larger than the sum of its proper divisors (32617942633).

1011156220631 is an equidigital number, since it uses as much as digits as its factorization.

1011156220631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32617942632.

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 1011156220631 in words is "one trillion, eleven billion, one hundred fifty-six million, two hundred twenty thousand, six hundred thirty-one".