101222113261 has 2 divisors, whose sum is σ = 101222113262. Its totient is φ = 101222113260.

The previous prime is 101222113259. The next prime is 101222113297. The reversal of 101222113261 is 162311222101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100556215236 + 665898025 = 317106^2 + 25805^2 .

It is a cyclic number.

It is not a de Polignac number, because 101222113261 - 2¹ = 101222113259 is a prime.

Together with 101222113259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101222111261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50611056630 + 50611056631.

It is an arithmetic number, because the mean of its divisors is an integer number (50611056631).

Almost surely, 2^101222113261 is an apocalyptic number.

It is an amenable number.

101222113261 is a deficient number, since it is larger than the sum of its proper divisors (1).

101222113261 is an equidigital number, since it uses as much as digits as its factorization.

101222113261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 101222113261 its reverse (162311222101), we get a palindrome (263533335362).

The spelling of 101222113261 in words is "one hundred one billion, two hundred twenty-two million, one hundred thirteen thousand, two hundred sixty-one".