21321011032 has 16 divisors (see below), whose sum is σ = 39991521600. Its totient is φ = 10656605280.

The previous prime is 21321010981. The next prime is 21321011053. The reversal of 21321011032 is 23011012312.

It is a super-2 number, since 2×21321011032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21321010997 and 21321011015.

It is a congruent number.

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, 464232 + ... + 508087.

It is an arithmetic number, because the mean of its divisors is an integer number (2499470100).

Almost surely, 2^21321011032 is an apocalyptic number.

It is an amenable number.

21321011032 is a deficient number, since it is larger than the sum of its proper divisors (18670510568).

21321011032 is a wasteful number, since it uses less digits than its factorization.

21321011032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975066 (or 975062 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21321011032 its reverse (23011012312), we get a palindrome (44332023344).

The spelling of 21321011032 in words is "twenty-one billion, three hundred twenty-one million, eleven thousand, thirty-two".