101230331261 has 2 divisors, whose sum is σ = 101230331262. Its totient is φ = 101230331260.

The previous prime is 101230331221. The next prime is 101230331399. The reversal of 101230331261 is 162133032101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58327080100 + 42903251161 = 241510^2 + 207131^2 .

It is a cyclic number.

It is not a de Polignac number, because 101230331261 - 2¹⁰ = 101230330237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101230331221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50615165630 + 50615165631.

It is an arithmetic number, because the mean of its divisors is an integer number (50615165631).

Almost surely, 2^101230331261 is an apocalyptic number.

It is an amenable number.

101230331261 is a deficient number, since it is larger than the sum of its proper divisors (1).

101230331261 is an equidigital number, since it uses as much as digits as its factorization.

101230331261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 101230331261 its reverse (162133032101), we get a palindrome (263363363362).

The spelling of 101230331261 in words is "one hundred one billion, two hundred thirty million, three hundred thirty-one thousand, two hundred sixty-one".