1200021022111 has 2 divisors, whose sum is σ = 1200021022112. Its totient is φ = 1200021022110.

The previous prime is 1200021022051. The next prime is 1200021022139. The reversal of 1200021022111 is 1112201200021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200021022111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200021022091 and 1200021022100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200021022171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600010511055 + 600010511056.

It is an arithmetic number, because the mean of its divisors is an integer number (600010511056).

Almost surely, 2^{1200021022111} is an apocalyptic number.

1200021022111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200021022111 is an equidigital number, since it uses as much as digits as its factorization.

1200021022111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200021022111 its reverse (1112201200021), we get a palindrome (2312222222132).

The spelling of 1200021022111 in words is "one trillion, two hundred billion, twenty-one million, twenty-two thousand, one hundred eleven".