123012020149 has 2 divisors, whose sum is σ = 123012020150. Its totient is φ = 123012020148.

The previous prime is 123012020119. The next prime is 123012020161. The reversal of 123012020149 is 941020210321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81385819524 + 41626200625 = 285282^2 + 204025^2 .

It is a cyclic number.

It is not a de Polignac number, because 123012020149 - 2¹⁵ = 123011987381 is a prime.

It is a super-2 number, since 2×123012020149² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123012020119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506010074 + 61506010075.

It is an arithmetic number, because the mean of its divisors is an integer number (61506010075).

Almost surely, 2^123012020149 is an apocalyptic number.

It is an amenable number.

123012020149 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012020149 is an equidigital number, since it uses as much as digits as its factorization.

123012020149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 123012020149 in words is "one hundred twenty-three billion, twelve million, twenty thousand, one hundred forty-nine".