21010332031 has 16 divisors (see below), whose sum is σ = 24852925440. Its totient is φ = 17574559200.

The previous prime is 21010332023. The next prime is 21010332089. The reversal of 21010332031 is 13023301012.

It is not a de Polignac number, because 21010332031 - 2³ = 21010332023 is a prime.

It is a super-2 number, since 2×21010332031² (a number of 21 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 = 21010331996 and 21010332014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010332631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1843495 + ... + 1854856.

It is an arithmetic number, because the mean of its divisors is an integer number (1553307840).

Almost surely, 2^21010332031 is an apocalyptic number.

21010332031 is a deficient number, since it is larger than the sum of its proper divisors (3842593409).

21010332031 is a wasteful number, since it uses less digits than its factorization.

21010332031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698406.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21010332031 its reverse (13023301012), we get a palindrome (34033633043).

The spelling of 21010332031 in words is "twenty-one billion, ten million, three hundred thirty-two thousand, thirty-one".