110521421 has 4 divisors (see below), whose sum is σ = 110593344. Its totient is φ = 110449500.

The previous prime is 110521409. The next prime is 110521427. The reversal of 110521421 is 124125011.

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 110521421 - 2²⁶ = 43412557 is a prime.

It is a super-3 number, since 3×110521421³ (a number of 25 digits) contains 333 as substring.

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 110521421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110521427) 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, 33605 + ... + 36746.

It is an arithmetic number, because the mean of its divisors is an integer number (27648336).

Almost surely, 2^110521421 is an apocalyptic number.

It is an amenable number.

110521421 is a deficient number, since it is larger than the sum of its proper divisors (71923).

110521421 is an equidigital number, since it uses as much as digits as its factorization.

110521421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71922.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 110521421 is about 10512.9168645053. The cubic root of 110521421 is about 479.8978674484.

Adding to 110521421 its reverse (124125011), we get a palindrome (234646432).

The spelling of 110521421 in words is "one hundred ten million, five hundred twenty-one thousand, four hundred twenty-one".