22010223331661 has 2 divisors, whose sum is σ = 22010223331662. Its totient is φ = 22010223331660.

The previous prime is 22010223331631. The next prime is 22010223331693. The reversal of 22010223331661 is 16613332201022.

It is an a-pointer prime, because the next prime (22010223331693) can be obtained adding 22010223331661 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19210645170025 + 2799578161636 = 4382995^2 + 1673194^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010223331661 - 2³⁸ = 21735345424717 is a prime.

It is a super-2 number, since 2×22010223331661² (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 (22010223331631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005111665830 + 11005111665831.

It is an arithmetic number, because the mean of its divisors is an integer number (11005111665831).

Almost surely, 2^{22010223331661} is an apocalyptic number.

It is an amenable number.

22010223331661 is a deficient number, since it is larger than the sum of its proper divisors (1).

22010223331661 is an equidigital number, since it uses as much as digits as its factorization.

22010223331661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 22010223331661 its reverse (16613332201022), we get a palindrome (38623555532683).

The spelling of 22010223331661 in words is "twenty-two trillion, ten billion, two hundred twenty-three million, three hundred thirty-one thousand, six hundred sixty-one".