22121212122201 has 16 divisors (see below), whose sum is σ = 29872429352960. Its totient is φ = 14558786395920.

The previous prime is 22121212122197. The next prime is 22121212122227. The reversal of 22121212122201 is 10222121212122.

It is not a de Polignac number, because 22121212122201 - 2² = 22121212122197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121212122901) 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, 4726765 + ... + 8159946.

It is an arithmetic number, because the mean of its divisors is an integer number (1867026834560).

Almost surely, 2^{22121212122201} is an apocalyptic number.

It is an amenable number.

22121212122201 is a deficient number, since it is larger than the sum of its proper divisors (7751217230759).

22121212122201 is a wasteful number, since it uses less digits than its factorization.

22121212122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12894036.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22121212122201 its reverse (10222121212122), we get a palindrome (32343333334323).

The spelling of 22121212122201 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, two hundred one".