22001012220021 has 8 divisors (see below), whose sum is σ = 31060252545984. Its totient is φ = 13804556687040.

The previous prime is 22001012219983. The next prime is 22001012220023. The reversal of 22001012220021 is 12002221010022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22001012220021 - 2¹¹ = 22001012217973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001012220023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215696198185 + ... + 215696198286.

It is an arithmetic number, because the mean of its divisors is an integer number (3882531568248).

Almost surely, 2^{22001012220021} is an apocalyptic number.

It is an amenable number.

22001012220021 is a deficient number, since it is larger than the sum of its proper divisors (9059240325963).

22001012220021 is a wasteful number, since it uses less digits than its factorization.

22001012220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431392396491.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22001012220021 its reverse (12002221010022), we get a palindrome (34003233230043).

The spelling of 22001012220021 in words is "twenty-two trillion, one billion, twelve million, two hundred twenty thousand, twenty-one".