22121021001 has 16 divisors (see below), whose sum is σ = 29603052864. Its totient is φ = 14693209344.

The previous prime is 22121020979. The next prime is 22121021003. The reversal of 22121021001 is 10012012122.

It is not a de Polignac number, because 22121021001 - 2⁹ = 22121020489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121021003) 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, 3748285 + ... + 3754181.

It is an arithmetic number, because the mean of its divisors is an integer number (1850190804).

Almost surely, 2^22121021001 is an apocalyptic number.

It is an amenable number.

22121021001 is a deficient number, since it is larger than the sum of its proper divisors (7482031863).

22121021001 is a wasteful number, since it uses less digits than its factorization.

22121021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10280.

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

Adding to 22121021001 its reverse (10012012122), we get a palindrome (32133033123).

The spelling of 22121021001 in words is "twenty-two billion, one hundred twenty-one million, twenty-one thousand, one".