123311212019 has 16 divisors (see below), whose sum is σ = 132739004160. Its totient is φ = 114125967360.

The previous prime is 123311211977. The next prime is 123311212027. The reversal of 123311212019 is 910212113321.

It is a cyclic number.

It is not a de Polignac number, because 123311212019 - 2²⁰ = 123310163443 is a prime.

It is a super-2 number, since 2×123311212019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123311212819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4797827 + ... + 4823459.

It is an arithmetic number, because the mean of its divisors is an integer number (8296187760).

Almost surely, 2^123311212019 is an apocalyptic number.

123311212019 is a deficient number, since it is larger than the sum of its proper divisors (9427792141).

123311212019 is a wasteful number, since it uses less digits than its factorization.

123311212019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30350.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 123311212019 in words is "one hundred twenty-three billion, three hundred eleven million, two hundred twelve thousand, nineteen".