2210100211261 has 2 divisors, whose sum is σ = 2210100211262. Its totient is φ = 2210100211260.

The previous prime is 2210100211211. The next prime is 2210100211271. The reversal of 2210100211261 is 1621120010122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2210036051161 + 64160100 = 1486619^2 + 8010^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210100211261 - 2⁷ = 2210100211133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2210100211211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105050105630 + 1105050105631.

It is an arithmetic number, because the mean of its divisors is an integer number (1105050105631).

Almost surely, 2^{2210100211261} is an apocalyptic number.

It is an amenable number.

2210100211261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210100211261 is an equidigital number, since it uses as much as digits as its factorization.

2210100211261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2210100211261 its reverse (1621120010122), we get a palindrome (3831220221383).

The spelling of 2210100211261 in words is "two trillion, two hundred ten billion, one hundred million, two hundred eleven thousand, two hundred sixty-one".