19120531123 has 2 divisors, whose sum is σ = 19120531124. Its totient is φ = 19120531122.

The previous prime is 19120531109. The next prime is 19120531147. The reversal of 19120531123 is 32113502191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19120531123 - 2¹⁷ = 19120400051 is a prime.

It is a super-2 number, since 2×19120531123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19120531091 and 19120531100.

It is not a weakly prime, because it can be changed into another prime (19120531223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9560265561 + 9560265562.

It is an arithmetic number, because the mean of its divisors is an integer number (9560265562).

Almost surely, 2^19120531123 is an apocalyptic number.

19120531123 is a deficient number, since it is larger than the sum of its proper divisors (1).

19120531123 is an equidigital number, since it uses as much as digits as its factorization.

19120531123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The spelling of 19120531123 in words is "nineteen billion, one hundred twenty million, five hundred thirty-one thousand, one hundred twenty-three".