102621312361 has 4 divisors (see below), whose sum is σ = 103061747412. Its totient is φ = 102180877312.

The previous prime is 102621312323. The next prime is 102621312373. The reversal of 102621312361 is 163213126201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29234502361 + 73386810000 = 170981^2 + 270900^2 .

It is a cyclic number.

It is not a de Polignac number, because 102621312361 - 2¹⁹ = 102620788073 is a prime.

It is a super-2 number, since 2×102621312361² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102621312061) 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, 220217176 + ... + 220217641.

It is an arithmetic number, because the mean of its divisors is an integer number (25765436853).

Almost surely, 2^102621312361 is an apocalyptic number.

It is an amenable number.

102621312361 is a deficient number, since it is larger than the sum of its proper divisors (440435051).

102621312361 is an equidigital number, since it uses as much as digits as its factorization.

102621312361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440435050.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 102621312361 its reverse (163213126201), we get a palindrome (265834438562).

The spelling of 102621312361 in words is "one hundred two billion, six hundred twenty-one million, three hundred twelve thousand, three hundred sixty-one".