20102221220101 has 4 divisors (see below), whose sum is σ = 20102342964352. Its totient is φ = 20102099475852.

The previous prime is 20102221220089. The next prime is 20102221220131. The reversal of 20102221220101 is 10102212220102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20102221220101 - 2²⁷ = 20102087002373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102221220131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60624111 + ... + 60954796.

It is an arithmetic number, because the mean of its divisors is an integer number (5025585741088).

Almost surely, 2^{20102221220101} is an apocalyptic number.

It is an amenable number.

20102221220101 is a deficient number, since it is larger than the sum of its proper divisors (121744251).

20102221220101 is a wasteful number, since it uses less digits than its factorization.

20102221220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121744250.

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

Adding to 20102221220101 its reverse (10102212220102), we get a palindrome (30204433440203).

It can be divided in two parts, 2010222 and 1220101, that added together give a palindrome (3230323).

The spelling of 20102221220101 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, two hundred twenty thousand, one hundred one".