21323402121941 has 2 divisors, whose sum is σ = 21323402121942. Its totient is φ = 21323402121940.

The previous prime is 21323402121907. The next prime is 21323402122069. The reversal of 21323402121941 is 14912120432312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14888408102500 + 6434994019441 = 3858550^2 + 2536729^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323402121941 - 2¹⁴ = 21323402105557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323402121041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661701060970 + 10661701060971.

It is an arithmetic number, because the mean of its divisors is an integer number (10661701060971).

Almost surely, 2^{21323402121941} is an apocalyptic number.

It is an amenable number.

21323402121941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323402121941 is an equidigital number, since it uses as much as digits as its factorization.

21323402121941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 21323402121941 in words is "twenty-one trillion, three hundred twenty-three billion, four hundred two million, one hundred twenty-one thousand, nine hundred forty-one".