21975376141 has 2 divisors, whose sum is σ = 21975376142. Its totient is φ = 21975376140.

The previous prime is 21975376123. The next prime is 21975376183. The reversal of 21975376141 is 14167357912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21732951241 + 242424900 = 147421^2 + 15570^2 .

It is a cyclic number.

It is not a de Polignac number, because 21975376141 - 2²⁵ = 21941821709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21975376091 and 21975376100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21975376741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10987688070 + 10987688071.

It is an arithmetic number, because the mean of its divisors is an integer number (10987688071).

Almost surely, 2^21975376141 is an apocalyptic number.

It is an amenable number.

21975376141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21975376141 is an equidigital number, since it uses as much as digits as its factorization.

21975376141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 46.

The spelling of 21975376141 in words is "twenty-one billion, nine hundred seventy-five million, three hundred seventy-six thousand, one hundred forty-one".