21112211941 has 2 divisors, whose sum is σ = 21112211942. Its totient is φ = 21112211940.

The previous prime is 21112211929. The next prime is 21112211993. The reversal of 21112211941 is 14911221112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20692822500 + 419389441 = 143850^2 + 20479^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112211941 - 2⁹ = 21112211429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112211641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556105970 + 10556105971.

It is an arithmetic number, because the mean of its divisors is an integer number (10556105971).

Almost surely, 2^21112211941 is an apocalyptic number.

It is an amenable number.

21112211941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112211941 is an equidigital number, since it uses as much as digits as its factorization.

21112211941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 25.

The spelling of 21112211941 in words is "twenty-one billion, one hundred twelve million, two hundred eleven thousand, nine hundred forty-one".