22231221001 has 4 divisors (see below), whose sum is σ = 24252241104. Its totient is φ = 20210200900.

The previous prime is 22231220993. The next prime is 22231221013. The reversal of 22231221001 is 10012213222.

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 22231221001 - 2³ = 22231220993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22231221091) 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, 1010510035 + ... + 1010510056.

It is an arithmetic number, because the mean of its divisors is an integer number (6063060276).

Almost surely, 2^22231221001 is an apocalyptic number.

It is an amenable number.

22231221001 is a deficient number, since it is larger than the sum of its proper divisors (2021020103).

22231221001 is a wasteful number, since it uses less digits than its factorization.

22231221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021020102.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22231221001 its reverse (10012213222), we get a palindrome (32243434223).

The spelling of 22231221001 in words is "twenty-two billion, two hundred thirty-one million, two hundred twenty-one thousand, one".