22100260421 has 2 divisors, whose sum is σ = 22100260422. Its totient is φ = 22100260420.

The previous prime is 22100260393. The next prime is 22100260453. The reversal of 22100260421 is 12406200122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22093552321 + 6708100 = 148639^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 22100260421 - 2²² = 22096066117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22100260393 and 22100260402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22100260471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050130210 + 11050130211.

It is an arithmetic number, because the mean of its divisors is an integer number (11050130211).

Almost surely, 2^22100260421 is an apocalyptic number.

It is an amenable number.

22100260421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22100260421 is an equidigital number, since it uses as much as digits as its factorization.

22100260421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22100260421 its reverse (12406200122), we get a palindrome (34506460543).

The spelling of 22100260421 in words is "twenty-two billion, one hundred million, two hundred sixty thousand, four hundred twenty-one".