21120955002139 has 2 divisors, whose sum is σ = 21120955002140. Its totient is φ = 21120955002138.

The previous prime is 21120955002113. The next prime is 21120955002151. The reversal of 21120955002139 is 93120055902112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21120955002139 - 2⁷ = 21120955002011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21120955009139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560477501069 + 10560477501070.

It is an arithmetic number, because the mean of its divisors is an integer number (10560477501070).

Almost surely, 2^{21120955002139} is an apocalyptic number.

21120955002139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120955002139 is an equidigital number, since it uses as much as digits as its factorization.

21120955002139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 21120955002139 in words is "twenty-one trillion, one hundred twenty billion, nine hundred fifty-five million, two thousand, one hundred thirty-nine".