21021211022103 has 8 divisors (see below), whose sum is σ = 31142534847600. Its totient is φ = 14014140681384.

The previous prime is 21021211022047. The next prime is 21021211022111. The reversal of 21021211022103 is 30122011212012.

21021211022103 is a `hidden beast` number, since 210 + 21 + 211 + 0 + 221 + 0 + 3 = 666.

It is not a de Polignac number, because 21021211022103 - 2²¹ = 21021208924951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021211022143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389281685568 + ... + 389281685621.

It is an arithmetic number, because the mean of its divisors is an integer number (3892816855950).

Almost surely, 2^{21021211022103} is an apocalyptic number.

21021211022103 is a deficient number, since it is larger than the sum of its proper divisors (10121323825497).

21021211022103 is an equidigital number, since it uses as much as digits as its factorization.

21021211022103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778563371198 (or 778563371192 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21021211022103 its reverse (30122011212012), we get a palindrome (51143222234115).

The spelling of 21021211022103 in words is "twenty-one trillion, twenty-one billion, two hundred eleven million, twenty-two thousand, one hundred three".