102012220202261 has 2 divisors, whose sum is σ = 102012220202262. Its totient is φ = 102012220202260.

The previous prime is 102012220202257. The next prime is 102012220202359. The reversal of 102012220202261 is 162202022210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82215113235025 + 19797106967236 = 9067255^2 + 4449394^2 .

It is a cyclic number.

It is not a de Polignac number, because 102012220202261 - 2² = 102012220202257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102012220202231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51006110101130 + 51006110101131.

It is an arithmetic number, because the mean of its divisors is an integer number (51006110101131).

Almost surely, 2^{102012220202261} is an apocalyptic number.

It is an amenable number.

102012220202261 is a deficient number, since it is larger than the sum of its proper divisors (1).

102012220202261 is an equidigital number, since it uses as much as digits as its factorization.

102012220202261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 102012220202261 its reverse (162202022210201), we get a palindrome (264214242412462).

The spelling of 102012220202261 in words is "one hundred two trillion, twelve billion, two hundred twenty million, two hundred two thousand, two hundred sixty-one".