22211201200121 has 12 divisors (see below), whose sum is σ = 22661649924732. Its totient is φ = 21769334496000.

The previous prime is 22211201200093. The next prime is 22211201200127. The reversal of 22211201200121 is 12100210211222.

It can be written as a sum of positive squares in 6 ways, for example, as 1890174026896 + 20321027173225 = 1374836^2 + 4507885^2 .

It is not a de Polignac number, because 22211201200121 - 2¹⁰ = 22211201199097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22211201200121.

It is not an unprimeable number, because it can be changed into a prime (22211201200127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9575660 + ... + 11666861.

It is an arithmetic number, because the mean of its divisors is an integer number (1888470827061).

Almost surely, 2^{22211201200121} is an apocalyptic number.

It is an amenable number.

22211201200121 is a deficient number, since it is larger than the sum of its proper divisors (450448724611).

22211201200121 is an equidigital number, since it uses as much as digits as its factorization.

22211201200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21242924 (or 21242863 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22211201200121 its reverse (12100210211222), we get a palindrome (34311411411343).

The spelling of 22211201200121 in words is "twenty-two trillion, two hundred eleven billion, two hundred one million, two hundred thousand, one hundred twenty-one".