20101020131 has 8 divisors (see below), whose sum is σ = 21021703200. Its totient is φ = 19184230912.

The previous prime is 20101020127. The next prime is 20101020139. The reversal of 20101020131 is 13102010102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20101020131 - 2² = 20101020127 is a prime.

It is a super-2 number, since 2×20101020131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101020139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962900 + ... + 983553.

It is an arithmetic number, because the mean of its divisors is an integer number (2627712900).

Almost surely, 2^20101020131 is an apocalyptic number.

20101020131 is a deficient number, since it is larger than the sum of its proper divisors (920683069).

20101020131 is a wasteful number, since it uses less digits than its factorization.

20101020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946925.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20101020131 its reverse (13102010102), we get a palindrome (33203030233).

The spelling of 20101020131 in words is "twenty billion, one hundred one million, twenty thousand, one hundred thirty-one".