21377426141 has 2 divisors, whose sum is σ = 21377426142. Its totient is φ = 21377426140.

The previous prime is 21377426131. The next prime is 21377426143. The reversal of 21377426141 is 14162477312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18818078041 + 2559348100 = 137179^2 + 50590^2 .

It is a cyclic number.

It is not a de Polignac number, because 21377426141 - 2¹⁰ = 21377425117 is a prime.

Together with 21377426143, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21377426095 and 21377426104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21377426143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10688713070 + 10688713071.

It is an arithmetic number, because the mean of its divisors is an integer number (10688713071).

Almost surely, 2^21377426141 is an apocalyptic number.

It is an amenable number.

21377426141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21377426141 is an equidigital number, since it uses as much as digits as its factorization.

21377426141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 38.

The spelling of 21377426141 in words is "twenty-one billion, three hundred seventy-seven million, four hundred twenty-six thousand, one hundred forty-one".