1200102211991 has 2 divisors, whose sum is σ = 1200102211992. Its totient is φ = 1200102211990.

The previous prime is 1200102211967. The next prime is 1200102212009. The reversal of 1200102211991 is 1991122010021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1200102211991 - 2⁶ = 1200102211927 is a prime.

It is a super-2 number, since 2×1200102211991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200102211901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600051105995 + 600051105996.

It is an arithmetic number, because the mean of its divisors is an integer number (600051105996).

Almost surely, 2^{1200102211991} is an apocalyptic number.

1200102211991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200102211991 is an equidigital number, since it uses as much as digits as its factorization.

1200102211991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 1200102211991 in words is "one trillion, two hundred billion, one hundred two million, two hundred eleven thousand, nine hundred ninety-one".