102270018421 has 4 divisors (see below), whose sum is σ = 102271376992. Its totient is φ = 102268659852.

The previous prime is 102270018379. The next prime is 102270018547. The reversal of 102270018421 is 124810072201.

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 not a de Polignac number, because 102270018421 - 2¹³ = 102270010229 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 102270018421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102270018821) 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, 559305 + ... + 719278.

It is an arithmetic number, because the mean of its divisors is an integer number (25567844248).

Almost surely, 2^102270018421 is an apocalyptic number.

It is an amenable number.

102270018421 is a deficient number, since it is larger than the sum of its proper divisors (1358571).

102270018421 is an equidigital number, since it uses as much as digits as its factorization.

102270018421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358570.

The product of its (nonzero) digits is 1792, while the sum is 28.

The spelling of 102270018421 in words is "one hundred two billion, two hundred seventy million, eighteen thousand, four hundred twenty-one".