22111220121001 has 4 divisors (see below), whose sum is σ = 24121331041104. Its totient is φ = 20101109200900.

The previous prime is 22111220120917. The next prime is 22111220121061. The reversal of 22111220121001 is 10012102211122.

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 22111220121001 - 2²¹ = 22111218023849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22111220121061) 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, 1005055460035 + ... + 1005055460056.

It is an arithmetic number, because the mean of its divisors is an integer number (6030332760276).

Almost surely, 2^{22111220121001} is an apocalyptic number.

It is an amenable number.

22111220121001 is a deficient number, since it is larger than the sum of its proper divisors (2010110920103).

22111220121001 is a wasteful number, since it uses less digits than its factorization.

22111220121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010110920102.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22111220121001 its reverse (10012102211122), we get a palindrome (32123322332123).

The spelling of 22111220121001 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, one".