21001131010 has 8 divisors (see below), whose sum is σ = 37802035836. Its totient is φ = 8400452400.

The previous prime is 21001130993. The next prime is 21001131023. The reversal of 21001131010 is 1013110012.

It can be written as a sum of positive squares in 2 ways, for example, as 20195536321 + 805594689 = 142111^2 + 28383^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 2100113101 = 21001131010 / (2 + 1 + 0 + 0 + 1 + 1 + 3 + 1 + 0 + 1 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050056541 + ... + 1050056560.

Almost surely, 2^21001131010 is an apocalyptic number.

21001131010 is a deficient number, since it is larger than the sum of its proper divisors (16800904826).

21001131010 is a wasteful number, since it uses less digits than its factorization.

21001131010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100113108.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 21001131010 its reverse (1013110012), we get a palindrome (22014241022).

The spelling of 21001131010 in words is "twenty-one billion, one million, one hundred thirty-one thousand, ten".