2100205661039 has 2 divisors, whose sum is σ = 2100205661040. Its totient is φ = 2100205661038.

The previous prime is 2100205661003. The next prime is 2100205661069. The reversal of 2100205661039 is 9301665020012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2100205661039 - 2³⁶ = 2031486184303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100205661069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050102830519 + 1050102830520.

It is an arithmetic number, because the mean of its divisors is an integer number (1050102830520).

Almost surely, 2^{2100205661039} is an apocalyptic number.

2100205661039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100205661039 is an equidigital number, since it uses as much as digits as its factorization.

2100205661039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 2100205661039 in words is "two trillion, one hundred billion, two hundred five million, six hundred sixty-one thousand, thirty-nine".