21312131103003 has 32 divisors (see below), whose sum is σ = 31777856147520. Its totient is φ = 12619997890560.

The previous prime is 21312131102981. The next prime is 21312131103013. The reversal of 21312131103003 is 30030113121312.

It is a happy number.

It is not a de Polignac number, because 21312131103003 - 2¹⁶ = 21312131037467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21312131103013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91173768 + ... + 91407221.

It is an arithmetic number, because the mean of its divisors is an integer number (993058004610).

Almost surely, 2^{21312131103003} is an apocalyptic number.

21312131103003 is a deficient number, since it is larger than the sum of its proper divisors (10465725044517).

21312131103003 is a wasteful number, since it uses less digits than its factorization.

21312131103003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182581119.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21312131103003 its reverse (30030113121312), we get a palindrome (51342244224315).

The spelling of 21312131103003 in words is "twenty-one trillion, three hundred twelve billion, one hundred thirty-one million, one hundred three thousand, three".