21011631315 has 8 divisors (see below), whose sum is σ = 33618610128. Its totient is φ = 11206203360.

The previous prime is 21011631293. The next prime is 21011631359. The reversal of 21011631315 is 51313611012.

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

It is not a de Polignac number, because 21011631315 - 2¹⁵ = 21011598547 is a prime.

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, 700387696 + ... + 700387725.

It is an arithmetic number, because the mean of its divisors is an integer number (4202326266).

Almost surely, 2^21011631315 is an apocalyptic number.

21011631315 is a deficient number, since it is larger than the sum of its proper divisors (12606978813).

21011631315 is a wasteful number, since it uses less digits than its factorization.

21011631315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400775429.

The product of its (nonzero) digits is 540, while the sum is 24.

The spelling of 21011631315 in words is "twenty-one billion, eleven million, six hundred thirty-one thousand, three hundred fifteen".