12021121019 has 2 divisors, whose sum is σ = 12021121020. Its totient is φ = 12021121018.

The previous prime is 12021120997. The next prime is 12021121027. The reversal of 12021121019 is 91012112021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021121019 - 2¹⁶ = 12021055483 is a prime.

It is a super-2 number, since 2×12021121019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12021121219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010560509 + 6010560510.

It is an arithmetic number, because the mean of its divisors is an integer number (6010560510).

Almost surely, 2^12021121019 is an apocalyptic number.

12021121019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021121019 is an equidigital number, since it uses as much as digits as its factorization.

12021121019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12021121019 in words is "twelve billion, twenty-one million, one hundred twenty-one thousand, nineteen".