102215441261 has 2 divisors, whose sum is σ = 102215441262. Its totient is φ = 102215441260.

The previous prime is 102215441239. The next prime is 102215441291. The reversal of 102215441261 is 162144512201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102156305161 + 59136100 = 319619^2 + 7690^2 .

It is a cyclic number.

It is not a de Polignac number, because 102215441261 - 2¹⁴ = 102215424877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102215441291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51107720630 + 51107720631.

It is an arithmetic number, because the mean of its divisors is an integer number (51107720631).

Almost surely, 2^102215441261 is an apocalyptic number.

It is an amenable number.

102215441261 is a deficient number, since it is larger than the sum of its proper divisors (1).

102215441261 is an equidigital number, since it uses as much as digits as its factorization.

102215441261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 102215441261 its reverse (162144512201), we get a palindrome (264359953462).

The spelling of 102215441261 in words is "one hundred two billion, two hundred fifteen million, four hundred forty-one thousand, two hundred sixty-one".