21022101024 has 48 divisors (see below), whose sum is σ = 55280141280. Its totient is φ = 6995033600.

The previous prime is 21022101017. The next prime is 21022101091. The reversal of 21022101024 is 42010122012.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 21022100994 and 21022101012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137802 + ... + 247049.

It is an arithmetic number, because the mean of its divisors is an integer number (1151669610).

Almost surely, 2^21022101024 is an apocalyptic number.

21022101024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21022101024 is an abundant number, since it is smaller than the sum of its proper divisors (34258040256).

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

21022101024 is a wasteful number, since it uses less digits than its factorization.

21022101024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385433 (or 385425 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21022101024 its reverse (42010122012), we get a palindrome (63032223036).

The spelling of 21022101024 in words is "twenty-one billion, twenty-two million, one hundred one thousand, twenty-four".