21201212110022 has 16 divisors (see below), whose sum is σ = 36348473889792. Its totient is φ = 9085349050440.

The previous prime is 21201212110003. The next prime is 21201212110049. The reversal of 21201212110022 is 22001121210212.

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, 73576988 + ... + 73864575.

It is an arithmetic number, because the mean of its divisors is an integer number (2271779618112).

Almost surely, 2^{21201212110022} is an apocalyptic number.

21201212110022 is a deficient number, since it is larger than the sum of its proper divisors (15147261779770).

21201212110022 is a wasteful number, since it uses less digits than its factorization.

21201212110022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147451843.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21201212110022 its reverse (22001121210212), we get a palindrome (43202333320234).

The spelling of 21201212110022 in words is "twenty-one trillion, two hundred one billion, two hundred twelve million, one hundred ten thousand, twenty-two".