21020101022 has 8 divisors (see below), whose sum is σ = 31555644456. Its totient is φ = 10501552872.

The previous prime is 21020100973. The next prime is 21020101073. The reversal of 21020101022 is 22010102012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21020100994 and 21020101012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4245728 + ... + 4250675.

It is an arithmetic number, because the mean of its divisors is an integer number (3944455557).

Almost surely, 2^21020101022 is an apocalyptic number.

21020101022 is a deficient number, since it is larger than the sum of its proper divisors (10535543434).

21020101022 is a wasteful number, since it uses less digits than its factorization.

21020101022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8497642.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21020101022 its reverse (22010102012), we get a palindrome (43030203034).

The spelling of 21020101022 in words is "twenty-one billion, twenty million, one hundred one thousand, twenty-two".