22101233621 has 2 divisors, whose sum is σ = 22101233622. Its totient is φ = 22101233620.

The previous prime is 22101233579. The next prime is 22101233647. The reversal of 22101233621 is 12633210122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20905111396 + 1196122225 = 144586^2 + 34585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22101233621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22101233681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050616810 + 11050616811.

It is an arithmetic number, because the mean of its divisors is an integer number (11050616811).

Almost surely, 2^22101233621 is an apocalyptic number.

It is an amenable number.

22101233621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22101233621 is an equidigital number, since it uses as much as digits as its factorization.

22101233621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 22101233621 its reverse (12633210122), we get a palindrome (34734443743).

The spelling of 22101233621 in words is "twenty-two billion, one hundred one million, two hundred thirty-three thousand, six hundred twenty-one".