221002120139 has 2 divisors, whose sum is σ = 221002120140. Its totient is φ = 221002120138.

The previous prime is 221002120111. The next prime is 221002120147. The reversal of 221002120139 is 931021200122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221002120139 - 2²⁰ = 221001071563 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002122139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501060069 + 110501060070.

It is an arithmetic number, because the mean of its divisors is an integer number (110501060070).

Almost surely, 2^221002120139 is an apocalyptic number.

221002120139 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002120139 is an equidigital number, since it uses as much as digits as its factorization.

221002120139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 221002120139 in words is "two hundred twenty-one billion, two million, one hundred twenty thousand, one hundred thirty-nine".