22121661011 has 2 divisors, whose sum is σ = 22121661012. Its totient is φ = 22121661010.

The previous prime is 22121660969. The next prime is 22121661049. The reversal of 22121661011 is 11016612122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22121661011 - 2²⁶ = 22054552147 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22121666011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060830505 + 11060830506.

It is an arithmetic number, because the mean of its divisors is an integer number (11060830506).

Almost surely, 2^22121661011 is an apocalyptic number.

22121661011 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121661011 is an equidigital number, since it uses as much as digits as its factorization.

22121661011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 22121661011 in words is "twenty-two billion, one hundred twenty-one million, six hundred sixty-one thousand, eleven".