21103022101020 has 48 divisors (see below), whose sum is σ = 60994541303808. Its totient is φ = 5445941186880.

The previous prime is 21103022100983. The next prime is 21103022101067. The reversal of 21103022101020 is 2010122030112.

It is a super-2 number, since 2×21103022101020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5672853544 + ... + 5672857263.

It is an arithmetic number, because the mean of its divisors is an integer number (1270719610496).

Almost surely, 2^{21103022101020} is an apocalyptic number.

21103022101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21103022101020 is an abundant number, since it is smaller than the sum of its proper divisors (39891519202788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21103022101020 is a wasteful number, since it uses less digits than its factorization.

21103022101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11345710850 (or 11345710848 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21103022101020 its reverse (2010122030112), we get a palindrome (23113144131132).

The spelling of 21103022101020 in words is "twenty-one trillion, one hundred three billion, twenty-two million, one hundred one thousand, twenty".