21356141239 has 2 divisors, whose sum is σ = 21356141240. Its totient is φ = 21356141238.

The previous prime is 21356141203. The next prime is 21356141267. The reversal of 21356141239 is 93214165312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21356141239 - 2²¹ = 21354044087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21356141198 and 21356141207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21356141299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10678070619 + 10678070620.

It is an arithmetic number, because the mean of its divisors is an integer number (10678070620).

Almost surely, 2^21356141239 is an apocalyptic number.

21356141239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21356141239 is an equidigital number, since it uses as much as digits as its factorization.

21356141239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

It can be divided in two parts, 21356141 and 239, that added together give a triangular number (21356380 = T₆₅₃₅).

The spelling of 21356141239 in words is "twenty-one billion, three hundred fifty-six million, one hundred forty-one thousand, two hundred thirty-nine".