2101012102261 has 2 divisors, whose sum is σ = 2101012102262. Its totient is φ = 2101012102260.

The previous prime is 2101012102207. The next prime is 2101012102303. The reversal of 2101012102261 is 1622012101012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1073515643236 + 1027496459025 = 1036106^2 + 1013655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101012102261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101012162261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050506051130 + 1050506051131.

It is an arithmetic number, because the mean of its divisors is an integer number (1050506051131).

Almost surely, 2^{2101012102261} is an apocalyptic number.

It is an amenable number.

2101012102261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101012102261 is an equidigital number, since it uses as much as digits as its factorization.

2101012102261 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 2101012102261 its reverse (1622012101012), we get a palindrome (3723024203273).

The spelling of 2101012102261 in words is "two trillion, one hundred one billion, twelve million, one hundred two thousand, two hundred sixty-one".