22221012212001 has 24 divisors (see below), whose sum is σ = 32420077649856. Its totient is φ = 14664951194400.

The previous prime is 22221012211973. The next prime is 22221012212011. The reversal of 22221012212001 is 10021221012222.

It is a happy number.

22221012212001 is a `hidden beast` number, since 22 + 221 + 0 + 1 + 221 + 200 + 1 = 666.

It is not a de Polignac number, because 22221012212001 - 2²³ = 22221003823393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22221012212011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3618916 + ... + 7585418.

It is an arithmetic number, because the mean of its divisors is an integer number (1350836568744).

Almost surely, 2^{22221012212001} is an apocalyptic number.

It is an amenable number.

22221012212001 is a deficient number, since it is larger than the sum of its proper divisors (10199065437855).

22221012212001 is a wasteful number, since it uses less digits than its factorization.

22221012212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972773 (or 3972770 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22221012212001 its reverse (10021221012222), we get a palindrome (32242233224223).

The spelling of 22221012212001 in words is "twenty-two trillion, two hundred twenty-one billion, twelve million, two hundred twelve thousand, one".