222122011981 has 2 divisors, whose sum is σ = 222122011982. Its totient is φ = 222122011980.

The previous prime is 222122011973. The next prime is 222122012017. The reversal of 222122011981 is 189110221222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161898397956 + 60223614025 = 402366^2 + 245405^2 .

It is a cyclic number.

It is not a de Polignac number, because 222122011981 - 2³ = 222122011973 is a prime.

It is a super-2 number, since 2×222122011981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222122011381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111061005990 + 111061005991.

It is an arithmetic number, because the mean of its divisors is an integer number (111061005991).

Almost surely, 2^222122011981 is an apocalyptic number.

It is an amenable number.

222122011981 is a deficient number, since it is larger than the sum of its proper divisors (1).

222122011981 is an equidigital number, since it uses as much as digits as its factorization.

222122011981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 222122011981 in words is "two hundred twenty-two billion, one hundred twenty-two million, eleven thousand, nine hundred eighty-one".