21221000022139 has 2 divisors, whose sum is σ = 21221000022140. Its totient is φ = 21221000022138.

The previous prime is 21221000022109. The next prime is 21221000022161. The reversal of 21221000022139 is 93122000012212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221000022139 - 2⁷ = 21221000022011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21221000022109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610500011069 + 10610500011070.

It is an arithmetic number, because the mean of its divisors is an integer number (10610500011070).

Almost surely, 2^{21221000022139} is an apocalyptic number.

21221000022139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221000022139 is an equidigital number, since it uses as much as digits as its factorization.

21221000022139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21221000022139 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-two thousand, one hundred thirty-nine".