21101002021139 has 2 divisors, whose sum is σ = 21101002021140. Its totient is φ = 21101002021138.

The previous prime is 21101002021129. The next prime is 21101002021223. The reversal of 21101002021139 is 93112020010112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21101002021139 - 2⁴⁰ = 20001490393363 is a prime.

It is a super-2 number, since 2×21101002021139² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21101002021129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550501010569 + 10550501010570.

It is an arithmetic number, because the mean of its divisors is an integer number (10550501010570).

Almost surely, 2^{21101002021139} is an apocalyptic number.

21101002021139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101002021139 is an equidigital number, since it uses as much as digits as its factorization.

21101002021139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21101002021139 in words is "twenty-one trillion, one hundred one billion, two million, twenty-one thousand, one hundred thirty-nine".