2120402155 has 8 divisors (see below), whose sum is σ = 2544895584. Its totient is φ = 1696046400.

The previous prime is 2120402153. The next prime is 2120402203. The reversal of 2120402155 is 5512040212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2120402155 - 2¹ = 2120402153 is a prime.

It is a super-2 number, since 2×2120402155² = 8992210597857288050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120402153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3210 + ... + 65200.

It is an arithmetic number, because the mean of its divisors is an integer number (318111948).

Almost surely, 2^2120402155 is an apocalyptic number.

2120402155 is a deficient number, since it is larger than the sum of its proper divisors (424493429).

2120402155 is an equidigital number, since it uses as much as digits as its factorization.

2120402155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68837.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2120402155 is about 46047.8246500310. The cubic root of 2120402155 is about 1284.7128823007.

Adding to 2120402155 its reverse (5512040212), we get a palindrome (7632442367).

The spelling of 2120402155 in words is "two billion, one hundred twenty million, four hundred two thousand, one hundred fifty-five".