20101222101 has 16 divisors (see below), whose sum is σ = 27798547968. Its totient is φ = 12909528000.

The previous prime is 20101222051. The next prime is 20101222129. The reversal of 20101222101 is 10122210102.

It is not a de Polignac number, because 20101222101 - 2¹⁷ = 20101091029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101222171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 885285 + ... + 907706.

It is an arithmetic number, because the mean of its divisors is an integer number (1737409248).

Almost surely, 2^20101222101 is an apocalyptic number.

It is an amenable number.

20101222101 is a deficient number, since it is larger than the sum of its proper divisors (7697325867).

20101222101 is a wasteful number, since it uses less digits than its factorization.

20101222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793132.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20101222101 its reverse (10122210102), we get a palindrome (30223432203).

The spelling of 20101222101 in words is "twenty billion, one hundred one million, two hundred twenty-two thousand, one hundred one".