20111201212049 has 2 divisors, whose sum is σ = 20111201212050. Its totient is φ = 20111201212048.

The previous prime is 20111201212033. The next prime is 20111201212121. The reversal of 20111201212049 is 94021210211102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15651637126225 + 4459564085824 = 3956215^2 + 2111768^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111201212049 - 2⁴ = 20111201212033 is a prime.

It is not a weakly prime, because it can be changed into another prime (20111201212649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055600606024 + 10055600606025.

It is an arithmetic number, because the mean of its divisors is an integer number (10055600606025).

Almost surely, 2^{20111201212049} is an apocalyptic number.

It is an amenable number.

20111201212049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111201212049 is an equidigital number, since it uses as much as digits as its factorization.

20111201212049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 20111201212049 in words is "twenty trillion, one hundred eleven billion, two hundred one million, two hundred twelve thousand, forty-nine".