21201222001139 has 2 divisors, whose sum is σ = 21201222001140. Its totient is φ = 21201222001138.

The previous prime is 21201222001111. The next prime is 21201222001159. The reversal of 21201222001139 is 93110022210212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201222001139 - 2⁸ = 21201222000883 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201222001159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600611000569 + 10600611000570.

It is an arithmetic number, because the mean of its divisors is an integer number (10600611000570).

Almost surely, 2^{21201222001139} is an apocalyptic number.

21201222001139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201222001139 is an equidigital number, since it uses as much as digits as its factorization.

21201222001139 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 26.

The spelling of 21201222001139 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, one thousand, one hundred thirty-nine".