1200021121007 has 2 divisors, whose sum is σ = 1200021121008. Its totient is φ = 1200021121006.

The previous prime is 1200021120997. The next prime is 1200021121051. The reversal of 1200021121007 is 7001211200021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200021121007 - 2³⁸ = 925143214063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200021121307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600010560503 + 600010560504.

It is an arithmetic number, because the mean of its divisors is an integer number (600010560504).

Almost surely, 2^{1200021121007} is an apocalyptic number.

1200021121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200021121007 is an equidigital number, since it uses as much as digits as its factorization.

1200021121007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 1200021121007 its reverse (7001211200021), we get a palindrome (8201232321028).

The spelling of 1200021121007 in words is "one trillion, two hundred billion, twenty-one million, one hundred twenty-one thousand, seven".