20012222101121 has 4 divisors (see below), whose sum is σ = 20013875059632. Its totient is φ = 20010569142612.

The previous prime is 20012222101063. The next prime is 20012222101127. The reversal of 20012222101121 is 12110122221002.

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 20012222101121 - 2¹⁴ = 20012222084737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20012222101121.

It is not an unprimeable number, because it can be changed into a prime (20012222101127) 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, 826461095 + ... + 826485308.

It is an arithmetic number, because the mean of its divisors is an integer number (5003468764908).

Almost surely, 2^{20012222101121} is an apocalyptic number.

It is an amenable number.

20012222101121 is a deficient number, since it is larger than the sum of its proper divisors (1652958511).

20012222101121 is a wasteful number, since it uses less digits than its factorization.

20012222101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652958510.

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

Adding to 20012222101121 its reverse (12110122221002), we get a palindrome (32122344322123).

The spelling of 20012222101121 in words is "twenty trillion, twelve billion, two hundred twenty-two million, one hundred one thousand, one hundred twenty-one".