20120111149 has 2 divisors, whose sum is σ = 20120111150. Its totient is φ = 20120111148.

The previous prime is 20120111111. The next prime is 20120111171. The reversal of 20120111149 is 94111102102.

It is an a-pointer prime, because the next prime (20120111171) can be obtained adding 20120111149 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14570904100 + 5549207049 = 120710^2 + 74493^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120111149 - 2¹⁷ = 20119980077 is a prime.

It is a super-2 number, since 2×20120111149² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120111549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060055574 + 10060055575.

It is an arithmetic number, because the mean of its divisors is an integer number (10060055575).

Almost surely, 2^20120111149 is an apocalyptic number.

It is an amenable number.

20120111149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120111149 is an equidigital number, since it uses as much as digits as its factorization.

20120111149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 20120111149 in words is "twenty billion, one hundred twenty million, one hundred eleven thousand, one hundred forty-nine".