1021121002019 has 2 divisors, whose sum is σ = 1021121002020. Its totient is φ = 1021121002018.

The previous prime is 1021121002007. The next prime is 1021121002063. The reversal of 1021121002019 is 9102001211201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021121002019 - 2²⁰ = 1021119953443 is a prime.

It is a super-2 number, since 2×1021121002019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021121002619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510560501009 + 510560501010.

It is an arithmetic number, because the mean of its divisors is an integer number (510560501010).

Almost surely, 2^{1021121002019} is an apocalyptic number.

1021121002019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021121002019 is an equidigital number, since it uses as much as digits as its factorization.

1021121002019 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 1021121002019 in words is "one trillion, twenty-one billion, one hundred twenty-one million, two thousand, nineteen".