22211312221081 has 2 divisors, whose sum is σ = 22211312221082. Its totient is φ = 22211312221080.

The previous prime is 22211312220953. The next prime is 22211312221099. The reversal of 22211312221081 is 18012221311222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14373076121856 + 7838236099225 = 3791184^2 + 2799685^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211312221081 - 2⁷ = 22211312220953 is a prime.

It is a super-2 number, since 2×22211312221081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22211312221181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105656110540 + 11105656110541.

It is an arithmetic number, because the mean of its divisors is an integer number (11105656110541).

Almost surely, 2^{22211312221081} is an apocalyptic number.

It is an amenable number.

22211312221081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211312221081 is an equidigital number, since it uses as much as digits as its factorization.

22211312221081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The spelling of 22211312221081 in words is "twenty-two trillion, two hundred eleven billion, three hundred twelve million, two hundred twenty-one thousand, eighty-one".