2130420121 has 4 divisors (see below), whose sum is σ = 2134690000. Its totient is φ = 2126150244.

The previous prime is 2130420113. The next prime is 2130420133. The reversal of 2130420121 is 1210240312.

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 2130420121 - 2³ = 2130420113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130420095 and 2130420104.

It is not an unprimeable number, because it can be changed into a prime (2130420221) 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, 2134191 + ... + 2135188.

It is an arithmetic number, because the mean of its divisors is an integer number (533672500).

Almost surely, 2^2130420121 is an apocalyptic number.

It is an amenable number.

2130420121 is a deficient number, since it is larger than the sum of its proper divisors (4269879).

2130420121 is an equidigital number, since it uses as much as digits as its factorization.

2130420121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269878.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2130420121 is about 46156.4743129282. The cubic root of 2130420121 is about 1286.7329384627.

Adding to 2130420121 its reverse (1210240312), we get a palindrome (3340660433).

The spelling of 2130420121 in words is "two billion, one hundred thirty million, four hundred twenty thousand, one hundred twenty-one".