22220100100981 has 2 divisors, whose sum is σ = 22220100100982. Its totient is φ = 22220100100980.

The previous prime is 22220100100969. The next prime is 22220100101033. The reversal of 22220100100981 is 18900100102222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20561091700356 + 1659008400625 = 4534434^2 + 1288025^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220100100981 - 2¹⁷ = 22220099969909 is a prime.

It is a super-2 number, since 2×22220100100981² (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 (22220100100931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110050050490 + 11110050050491.

It is an arithmetic number, because the mean of its divisors is an integer number (11110050050491).

Almost surely, 2^{22220100100981} is an apocalyptic number.

It is an amenable number.

22220100100981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220100100981 is an equidigital number, since it uses as much as digits as its factorization.

22220100100981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 22220100100981 in words is "twenty-two trillion, two hundred twenty billion, one hundred million, one hundred thousand, nine hundred eighty-one".