22010102201981 has 2 divisors, whose sum is σ = 22010102201982. Its totient is φ = 22010102201980.

The previous prime is 22010102201959. The next prime is 22010102202013. The reversal of 22010102201981 is 18910220101022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15925167703225 + 6084934498756 = 3990635^2 + 2466766^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010102201981 - 2⁶ = 22010102201917 is a prime.

It is a super-2 number, since 2×22010102201981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22010102201921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005051100990 + 11005051100991.

It is an arithmetic number, because the mean of its divisors is an integer number (11005051100991).

Almost surely, 2^{22010102201981} is an apocalyptic number.

It is an amenable number.

22010102201981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22010102201981 is an equidigital number, since it uses as much as digits as its factorization.

22010102201981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 22010102201981 in words is "twenty-two trillion, ten billion, one hundred two million, two hundred one thousand, nine hundred eighty-one".