20214121 has 4 divisors (see below), whose sum is σ = 20422612. Its totient is φ = 20005632.

The previous prime is 20214113. The next prime is 20214127. The reversal of 20214121 is 12141202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11594025 + 8620096 = 3405^2 + 2936^2 .

It is a cyclic number.

It is not a de Polignac number, because 20214121 - 2³ = 20214113 is a prime.

It is a super-2 number, since 2×20214121² = 817221375605282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20214127) 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, 104100 + ... + 104293.

It is an arithmetic number, because the mean of its divisors is an integer number (5105653).

Almost surely, 2^20214121 is an apocalyptic number.

It is an amenable number.

20214121 is a deficient number, since it is larger than the sum of its proper divisors (208491).

20214121 is an equidigital number, since it uses as much as digits as its factorization.

20214121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208490.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 20214121 is about 4496.0116770311. The cubic root of 20214121 is about 272.4070148192.

Adding to 20214121 its reverse (12141202), we get a palindrome (32355323).

The spelling of 20214121 in words is "twenty million, two hundred fourteen thousand, one hundred twenty-one".