214121421 has 16 divisors (see below), whose sum is σ = 331009920. Its totient is φ = 136540800.

The previous prime is 214121419. The next prime is 214121423. The reversal of 214121421 is 124121412.

It is an interprime number because it is at equal distance from previous prime (214121419) and next prime (214121423).

It is not a de Polignac number, because 214121421 - 2¹ = 214121419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 214121394 and 214121403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214121423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171780 + ... + 173021.

It is an arithmetic number, because the mean of its divisors is an integer number (20688120).

Almost surely, 2^214121421 is an apocalyptic number.

It is an amenable number.

214121421 is a deficient number, since it is larger than the sum of its proper divisors (116888499).

214121421 is a wasteful number, since it uses less digits than its factorization.

214121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344833 (or 344827 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 214121421 is about 14632.8883341601. Note that the first 3 decimals coincide. The cubic root of 214121421 is about 598.2555078274.

Adding to 214121421 its reverse (124121412), we get a palindrome (338242833).

Subtracting from 214121421 its reverse (124121412), we obtain a palindrome (90000009).

The spelling of 214121421 in words is "two hundred fourteen million, one hundred twenty-one thousand, four hundred twenty-one".