21221121120139 has 2 divisors, whose sum is σ = 21221121120140. Its totient is φ = 21221121120138.

The previous prime is 21221121120037. The next prime is 21221121120151. The reversal of 21221121120139 is 93102112112212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221121120139 - 2²³ = 21221112731531 is a prime.

It is not a weakly prime, because it can be changed into another prime (21221121120179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610560560069 + 10610560560070.

It is an arithmetic number, because the mean of its divisors is an integer number (10610560560070).

Almost surely, 2^{21221121120139} is an apocalyptic number.

21221121120139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221121120139 is an equidigital number, since it uses as much as digits as its factorization.

21221121120139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 21221121120139 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, one hundred thirty-nine".