21012321422103 has 48 divisors (see below), whose sum is σ = 30994311828480. Its totient is φ = 12652300964160.

The previous prime is 21012321422093. The next prime is 21012321422119. The reversal of 21012321422103 is 30122412321012.

It is not a de Polignac number, because 21012321422103 - 2⁴ = 21012321422087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012321424103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 977897826 + ... + 977919312.

It is an arithmetic number, because the mean of its divisors is an integer number (645714829760).

Almost surely, 2^{21012321422103} is an apocalyptic number.

21012321422103 is a deficient number, since it is larger than the sum of its proper divisors (9981990406377).

21012321422103 is a wasteful number, since it uses less digits than its factorization.

21012321422103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38828 (or 38817 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21012321422103 its reverse (30122412321012), we get a palindrome (51134733743115).

The spelling of 21012321422103 in words is "twenty-one trillion, twelve billion, three hundred twenty-one million, four hundred twenty-two thousand, one hundred three".