1200021121051 has 2 divisors, whose sum is σ = 1200021121052. Its totient is φ = 1200021121050.

The previous prime is 1200021121007. The next prime is 1200021121069. The reversal of 1200021121051 is 1501211200021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200021121051 is a prime.

It is a super-3 number, since 3×1200021121051³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1200021121081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600010560525 + 600010560526.

It is an arithmetic number, because the mean of its divisors is an integer number (600010560526).

Almost surely, 2^{1200021121051} is an apocalyptic number.

1200021121051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200021121051 is an equidigital number, since it uses as much as digits as its factorization.

1200021121051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 1200021121051 its reverse (1501211200021), we get a palindrome (2701232321072).

The spelling of 1200021121051 in words is "one trillion, two hundred billion, twenty-one million, one hundred twenty-one thousand, fifty-one".