20122011149 has 2 divisors, whose sum is σ = 20122011150. Its totient is φ = 20122011148.

The previous prime is 20122011109. The next prime is 20122011229. The reversal of 20122011149 is 94111022102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19849992100 + 272019049 = 140890^2 + 16493^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122011149 - 2²⁰ = 20120962573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122011109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061005574 + 10061005575.

It is an arithmetic number, because the mean of its divisors is an integer number (10061005575).

Almost surely, 2^20122011149 is an apocalyptic number.

It is an amenable number.

20122011149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122011149 is an equidigital number, since it uses as much as digits as its factorization.

20122011149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 20122011149 in words is "twenty billion, one hundred twenty-two million, eleven thousand, one hundred forty-nine".