21002311022 has 16 divisors (see below), whose sum is σ = 39277049472. Its totient is φ = 8182718520.

The previous prime is 21002311019. The next prime is 21002311039. The reversal of 21002311022 is 22011320012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21002310988 and 21002311006.

It is a congruent number.

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, 68189168 + ... + 68189475.

It is an arithmetic number, because the mean of its divisors is an integer number (2454815592).

Almost surely, 2^21002311022 is an apocalyptic number.

21002311022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002311022 is a deficient number, since it is larger than the sum of its proper divisors (18274738450).

21002311022 is a wasteful number, since it uses less digits than its factorization.

21002311022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136378663.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21002311022 its reverse (22011320012), we get a palindrome (43013631034).

The spelling of 21002311022 in words is "twenty-one billion, two million, three hundred eleven thousand, twenty-two".