21201222102110 has 32 divisors (see below), whose sum is σ = 38513219532480. Its totient is φ = 8402488121088.

The previous prime is 21201222102091. The next prime is 21201222102197. The reversal of 21201222102110 is 1120122210212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51354674 + ... + 51765866.

It is an arithmetic number, because the mean of its divisors is an integer number (1203538110390).

Almost surely, 2^{21201222102110} is an apocalyptic number.

21201222102110 is a deficient number, since it is larger than the sum of its proper divisors (17311997430370).

21201222102110 is a wasteful number, since it uses less digits than its factorization.

21201222102110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458612.

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

Adding to 21201222102110 its reverse (1120122210212), we get a palindrome (22321344312322).

The spelling of 21201222102110 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, one hundred two thousand, one hundred ten".