2120452421 has 32 divisors (see below), whose sum is σ = 2439782400. Its totient is φ = 1832725440.

The previous prime is 2120452403. The next prime is 2120452429. The reversal of 2120452421 is 1242540212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120452421 is a prime.

It is a super-2 number, since 2×2120452421² = 8992636939449522482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120452429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 733040 + ... + 735926.

It is an arithmetic number, because the mean of its divisors is an integer number (76243200).

Almost surely, 2^2120452421 is an apocalyptic number.

It is an amenable number.

2120452421 is a deficient number, since it is larger than the sum of its proper divisors (319329979).

2120452421 is a wasteful number, since it uses less digits than its factorization.

2120452421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2120452421 is about 46048.3704489095. The cubic root of 2120452421 is about 1284.7230339704.

Adding to 2120452421 its reverse (1242540212), we get a palindrome (3362992633).

The spelling of 2120452421 in words is "two billion, one hundred twenty million, four hundred fifty-two thousand, four hundred twenty-one".