1200211022261 has 2 divisors, whose sum is σ = 1200211022262. Its totient is φ = 1200211022260.

The previous prime is 1200211022221. The next prime is 1200211022299. The reversal of 1200211022261 is 1622201120021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 651944819761 + 548266202500 = 807431^2 + 740450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200211022261 - 2²² = 1200206827957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200211022221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600105511130 + 600105511131.

It is an arithmetic number, because the mean of its divisors is an integer number (600105511131).

Almost surely, 2^{1200211022261} is an apocalyptic number.

It is an amenable number.

1200211022261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200211022261 is an equidigital number, since it uses as much as digits as its factorization.

1200211022261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1200211022261 its reverse (1622201120021), we get a palindrome (2822412142282).

The spelling of 1200211022261 in words is "one trillion, two hundred billion, two hundred eleven million, twenty-two thousand, two hundred sixty-one".