2222022100121 has 12 divisors (see below), whose sum is σ = 2332801542708. Its totient is φ = 2116290384384.

The previous prime is 2222022100079. The next prime is 2222022100127. The reversal of 2222022100121 is 1210012202222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 520145306521 + 1701876793600 = 721211^2 + 1304560^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2222022100121 is a prime.

It is a super-2 number, since 2×2222022100121² (a number of 25 digits) contains 22 as substring.

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 2222022100121.

It is not an unprimeable number, because it can be changed into a prime (2222022100127) 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, 8890520 + ... + 9137033.

It is an arithmetic number, because the mean of its divisors is an integer number (194400128559).

Almost surely, 2^{2222022100121} is an apocalyptic number.

It is an amenable number.

2222022100121 is a deficient number, since it is larger than the sum of its proper divisors (110779442587).

2222022100121 is a wasteful number, since it uses less digits than its factorization.

2222022100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18027832 (or 18027809 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2222022100121 its reverse (1210012202222), we get a palindrome (3432034302343).

The spelling of 2222022100121 in words is "two trillion, two hundred twenty-two billion, twenty-two million, one hundred thousand, one hundred twenty-one".