102630213661 has 4 divisors (see below), whose sum is σ = 102661101792. Its totient is φ = 102599325532.

The previous prime is 102630213599. The next prime is 102630213689. The reversal of 102630213661 is 166312036201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102630213661 is a prime.

It is a super-2 number, since 2×102630213661² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102630313661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15439081 + ... + 15445726.

It is an arithmetic number, because the mean of its divisors is an integer number (25665275448).

Almost surely, 2^102630213661 is an apocalyptic number.

It is an amenable number.

102630213661 is a deficient number, since it is larger than the sum of its proper divisors (30888131).

102630213661 is an equidigital number, since it uses as much as digits as its factorization.

102630213661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30888130.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 102630213661 its reverse (166312036201), we get a palindrome (268942249862).

The spelling of 102630213661 in words is "one hundred two billion, six hundred thirty million, two hundred thirteen thousand, six hundred sixty-one".