1202211101261 has 2 divisors, whose sum is σ = 1202211101262. Its totient is φ = 1202211101260.

The previous prime is 1202211101219. The next prime is 1202211101321. The reversal of 1202211101261 is 1621011122021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 899291856100 + 302919245161 = 948310^2 + 550381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202211101261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202214101261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601105550630 + 601105550631.

It is an arithmetic number, because the mean of its divisors is an integer number (601105550631).

Almost surely, 2^{1202211101261} is an apocalyptic number.

It is an amenable number.

1202211101261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202211101261 is an equidigital number, since it uses as much as digits as its factorization.

1202211101261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 1202211101261 its reverse (1621011122021), we get a palindrome (2823222223282).

The spelling of 1202211101261 in words is "one trillion, two hundred two billion, two hundred eleven million, one hundred one thousand, two hundred sixty-one".