22121011110001 has 4 divisors (see below), whose sum is σ = 22121404309872. Its totient is φ = 22120617910132.

The previous prime is 22121011109987. The next prime is 22121011110041. The reversal of 22121011110001 is 10001111012122.

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 22121011110001 - 2²³ = 22121002721393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121011110041) 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, 196515535 + ... + 196628068.

It is an arithmetic number, because the mean of its divisors is an integer number (5530351077468).

Almost surely, 2^{22121011110001} is an apocalyptic number.

It is an amenable number.

22121011110001 is a deficient number, since it is larger than the sum of its proper divisors (393199871).

22121011110001 is an equidigital number, since it uses as much as digits as its factorization.

22121011110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393199870.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 22121011110001 its reverse (10001111012122), we get a palindrome (32122122122123).

The spelling of 22121011110001 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, one hundred ten thousand, one".