1221002112019 has 2 divisors, whose sum is σ = 1221002112020. Its totient is φ = 1221002112018.

The previous prime is 1221002111963. The next prime is 1221002112037. The reversal of 1221002112019 is 9102112001221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221002112019 - 2⁹ = 1221002111507 is a prime.

It is a super-2 number, since 2×1221002112019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1221002112049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610501056009 + 610501056010.

It is an arithmetic number, because the mean of its divisors is an integer number (610501056010).

Almost surely, 2^{1221002112019} is an apocalyptic number.

1221002112019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221002112019 is an equidigital number, since it uses as much as digits as its factorization.

1221002112019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1221002112019 in words is "one trillion, two hundred twenty-one billion, two million, one hundred twelve thousand, nineteen".