1200021022051 has 2 divisors, whose sum is σ = 1200021022052. Its totient is φ = 1200021022050.

The previous prime is 1200021022009. The next prime is 1200021022111. The reversal of 1200021022051 is 1502201200021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200021022051 - 2⁹ = 1200021021539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200021022951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600010511025 + 600010511026.

It is an arithmetic number, because the mean of its divisors is an integer number (600010511026).

Almost surely, 2^{1200021022051} is an apocalyptic number.

1200021022051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200021022051 is an equidigital number, since it uses as much as digits as its factorization.

1200021022051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 1200021022051 its reverse (1502201200021), we get a palindrome (2702222222072).

The spelling of 1200021022051 in words is "one trillion, two hundred billion, twenty-one million, twenty-two thousand, fifty-one".