22111012202121 has 6 divisors (see below), whose sum is σ = 31938128736410. Its totient is φ = 14740674801408.

The previous prime is 22111012202101. The next prime is 22111012202129. The reversal of 22111012202121 is 12120221011122.

22111012202121 is a `hidden beast` number, since 221 + 1 + 10 + 1 + 220 + 212 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12011734982025 + 10099277220096 = 3465795^2 + 3177936^2 .

It is not a de Polignac number, because 22111012202121 - 2¹⁴ = 22111012185737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111012202094 and 22111012202103.

It is not an unprimeable number, because it can be changed into a prime (22111012202129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1228389566776 + ... + 1228389566793.

Almost surely, 2^{22111012202121} is an apocalyptic number.

It is an amenable number.

22111012202121 is a deficient number, since it is larger than the sum of its proper divisors (9827116534289).

22111012202121 is a wasteful number, since it uses less digits than its factorization.

22111012202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456779133575 (or 2456779133572 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22111012202121 its reverse (12120221011122), we get a palindrome (34231233213243).

The spelling of 22111012202121 in words is "twenty-two trillion, one hundred eleven billion, twelve million, two hundred two thousand, one hundred twenty-one".