121231023019 has 2 divisors, whose sum is σ = 121231023020. Its totient is φ = 121231023018.

The previous prime is 121231022981. The next prime is 121231023037. The reversal of 121231023019 is 910320132121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121231023019 - 2³¹ = 119083539371 is a prime.

It is a super-2 number, since 2×121231023019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121231022984 and 121231023002.

It is not a weakly prime, because it can be changed into another prime (121231023119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615511509 + 60615511510.

It is an arithmetic number, because the mean of its divisors is an integer number (60615511510).

Almost surely, 2^121231023019 is an apocalyptic number.

121231023019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121231023019 is an equidigital number, since it uses as much as digits as its factorization.

121231023019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 121231023019 in words is "one hundred twenty-one billion, two hundred thirty-one million, twenty-three thousand, nineteen".