21202220110102 has 16 divisors (see below), whose sum is σ = 31868454088800. Its totient is φ = 10579404590272.

The previous prime is 21202220109977. The next prime is 21202220110117. The reversal of 21202220110102 is 20101102220212.

It is a happy number.

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, 16516524 + ... + 17753872.

It is an arithmetic number, because the mean of its divisors is an integer number (1991778380550).

Almost surely, 2^{21202220110102} is an apocalyptic number.

21202220110102 is a deficient number, since it is larger than the sum of its proper divisors (10666233978698).

21202220110102 is a wasteful number, since it uses less digits than its factorization.

21202220110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254887.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202220110102 its reverse (20101102220212), we get a palindrome (41303322330314).

It can be divided in two parts, 21202220110 and 102, that added together give a palindrome (21202220212).

The spelling of 21202220110102 in words is "twenty-one trillion, two hundred two billion, two hundred twenty million, one hundred ten thousand, one hundred two".