921114421 has 4 divisors (see below), whose sum is σ = 921204844. Its totient is φ = 921024000.

The previous prime is 921114409. The next prime is 921114427. The reversal of 921114421 is 124411129.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 637562500 + 283551921 = 25250^2 + 16839^2 .

It is a cyclic number.

It is not a de Polignac number, because 921114421 - 2¹⁹ = 920590133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921114427) 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, 27660 + ... + 51061.

It is an arithmetic number, because the mean of its divisors is an integer number (230301211).

Almost surely, 2^921114421 is an apocalyptic number.

It is an amenable number.

921114421 is a deficient number, since it is larger than the sum of its proper divisors (90423).

921114421 is a wasteful number, since it uses less digits than its factorization.

921114421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90422.

The product of its digits is 576, while the sum is 25.

The square root of 921114421 is about 30349.8669025088. The cubic root of 921114421 is about 972.9813755177.

It can be divided in two parts, 9211 and 14421, that added together give a palindrome (23632).

The spelling of 921114421 in words is "nine hundred twenty-one million, one hundred fourteen thousand, four hundred twenty-one".