20102221220102 has 64 divisors (see below), whose sum is σ = 34702653173760. Its totient is φ = 8555049570816.

The previous prime is 20102221220089. The next prime is 20102221220131. The reversal of 20102221220102 is 20102212220102.

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 31 ways as a sum of consecutive naturals, for example, 1918694888 + ... + 1918705364.

It is an arithmetic number, because the mean of its divisors is an integer number (542228955840).

Almost surely, 2^{20102221220102} is an apocalyptic number.

20102221220102 is a deficient number, since it is larger than the sum of its proper divisors (14600431953658).

20102221220102 is a wasteful number, since it uses less digits than its factorization.

20102221220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12285.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20102221220102 its reverse (20102212220102), we get a palindrome (40204433440204).

Subtracting from 20102221220102 its reverse (20102212220102), we obtain a square (9000000 = 3000²).

The spelling of 20102221220102 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, two hundred twenty thousand, one hundred two".