2130121 has 4 divisors (see below), whose sum is σ = 2434432. Its totient is φ = 1825812.

The previous prime is 2130101. The next prime is 2130133. The reversal of 2130121 is 1210312.

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 2130121 - 2²¹ = 32969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2130098 and 2130107.

It is not an unprimeable number, because it can be changed into a prime (2130101) 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, 152145 + ... + 152158.

It is an arithmetic number, because the mean of its divisors is an integer number (608608).

2^2130121 is an apocalyptic number.

It is an amenable number.

2130121 is a deficient number, since it is larger than the sum of its proper divisors (304311).

2130121 is an equidigital number, since it uses as much as digits as its factorization.

2130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304310.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2130121 is about 1459.4934052609. The cubic root of 2130121 is about 128.6672714526.

Adding to 2130121 its reverse (1210312), we get a palindrome (3340433).

The spelling of 2130121 in words is "two million, one hundred thirty thousand, one hundred twenty-one".