20113021211249 has 2 divisors, whose sum is σ = 20113021211250. Its totient is φ = 20113021211248.

The previous prime is 20113021211207. The next prime is 20113021211281. The reversal of 20113021211249 is 94211212031102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13893324390625 + 6219696820624 = 3727375^2 + 2493932^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113021211249 - 2²⁰ = 20113020162673 is a prime.

It is not a weakly prime, because it can be changed into another prime (20113021211149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056510605624 + 10056510605625.

It is an arithmetic number, because the mean of its divisors is an integer number (10056510605625).

Almost surely, 2^{20113021211249} is an apocalyptic number.

It is an amenable number.

20113021211249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113021211249 is an equidigital number, since it uses as much as digits as its factorization.

20113021211249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 20113021211249 in words is "twenty trillion, one hundred thirteen billion, twenty-one million, two hundred eleven thousand, two hundred forty-nine".