21201000022 has 4 divisors (see below), whose sum is σ = 31801500036. Its totient is φ = 10600500010.

The previous prime is 21201000017. The next prime is 21201000061. The reversal of 21201000022 is 22000010212.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21200999972 and 21201000008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300250004 + ... + 5300250007.

It is an arithmetic number, because the mean of its divisors is an integer number (7950375009).

Almost surely, 2^21201000022 is an apocalyptic number.

21201000022 is a deficient number, since it is larger than the sum of its proper divisors (10600500014).

21201000022 is a wasteful number, since it uses less digits than its factorization.

21201000022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600500013.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21201000022 its reverse (22000010212), we get a palindrome (43201010234).

The spelling of 21201000022 in words is "twenty-one billion, two hundred one million, twenty-two", and thus it is an aban number.