102127621017621 has 4 divisors (see below), whose sum is σ = 136170161356832. Its totient is φ = 68085080678412.

The previous prime is 102127621017589. The next prime is 102127621017641. The reversal of 102127621017621 is 126710126721201.

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 not a de Polignac number, because 102127621017621 - 2⁵ = 102127621017589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102127621017621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102127621017641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17021270169601 + ... + 17021270169606.

It is an arithmetic number, because the mean of its divisors is an integer number (34042540339208).

Almost surely, 2^{102127621017621} is an apocalyptic number.

It is an amenable number.

102127621017621 is a deficient number, since it is larger than the sum of its proper divisors (34042540339211).

102127621017621 is an equidigital number, since it uses as much as digits as its factorization.

102127621017621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34042540339210.

The product of its (nonzero) digits is 28224, while the sum is 39.

Adding to 102127621017621 its reverse (126710126721201), we get a palindrome (228837747738822).

The spelling of 102127621017621 in words is "one hundred two trillion, one hundred twenty-seven billion, six hundred twenty-one million, seventeen thousand, six hundred twenty-one".