101218962661 has 2 divisors, whose sum is σ = 101218962662. Its totient is φ = 101218962660.

The previous prime is 101218962641. The next prime is 101218962673. The reversal of 101218962661 is 166269812101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85059722500 + 16159240161 = 291650^2 + 127119^2 .

It is a cyclic number.

It is not a de Polignac number, because 101218962661 - 2¹¹ = 101218960613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101218962601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50609481330 + 50609481331.

It is an arithmetic number, because the mean of its divisors is an integer number (50609481331).

Almost surely, 2^101218962661 is an apocalyptic number.

It is an amenable number.

101218962661 is a deficient number, since it is larger than the sum of its proper divisors (1).

101218962661 is an equidigital number, since it uses as much as digits as its factorization.

101218962661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 101218962661 in words is "one hundred one billion, two hundred eighteen million, nine hundred sixty-two thousand, six hundred sixty-one".