21201012022 has 16 divisors (see below), whose sum is σ = 33478709760. Its totient is φ = 10041556392.

The previous prime is 21201012017. The next prime is 21201012023. The reversal of 21201012022 is 22021010212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21201011993 and 21201012011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201012023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452803 + ... + 497425.

It is an arithmetic number, because the mean of its divisors is an integer number (2092419360).

Almost surely, 2^21201012022 is an apocalyptic number.

21201012022 is a deficient number, since it is larger than the sum of its proper divisors (12277697738).

21201012022 is a wasteful number, since it uses less digits than its factorization.

21201012022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57147.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21201012022 its reverse (22021010212), we get a palindrome (43222022234).

The spelling of 21201012022 in words is "twenty-one billion, two hundred one million, twelve thousand, twenty-two".