1200101222261 has 2 divisors, whose sum is σ = 1200101222262. Its totient is φ = 1200101222260.

The previous prime is 1200101222209. The next prime is 1200101222263. The reversal of 1200101222261 is 1622221010021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1058645499025 + 141455723236 = 1028905^2 + 376106^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200101222261 - 2¹⁰ = 1200101221237 is a prime.

It is a super-2 number, since 2×1200101222261² (a number of 25 digits) contains 22 as substring.

Together with 1200101222263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200101222263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600050611130 + 600050611131.

It is an arithmetic number, because the mean of its divisors is an integer number (600050611131).

Almost surely, 2^{1200101222261} is an apocalyptic number.

It is an amenable number.

1200101222261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200101222261 is an equidigital number, since it uses as much as digits as its factorization.

1200101222261 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 1200101222261 its reverse (1622221010021), we get a palindrome (2822322232282).

The spelling of 1200101222261 in words is "one trillion, two hundred billion, one hundred one million, two hundred twenty-two thousand, two hundred sixty-one".