2120021123 has 8 divisors (see below), whose sum is σ = 2314388160. Its totient is φ = 1925927080.

The previous prime is 2120021119. The next prime is 2120021161. The reversal of 2120021123 is 3211200212.

It is a happy number.

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

It is not a de Polignac number, because 2120021123 - 2² = 2120021119 is a prime.

It is a super-2 number, since 2×2120021123² = 8988979123932362258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120021098 and 2120021107.

It is not an unprimeable number, because it can be changed into a prime (2120021173) 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, 51833 + ... + 83226.

It is an arithmetic number, because the mean of its divisors is an integer number (289298520).

Almost surely, 2^2120021123 is an apocalyptic number.

2120021123 is a deficient number, since it is larger than the sum of its proper divisors (194367037).

2120021123 is a wasteful number, since it uses less digits than its factorization.

2120021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136497.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2120021123 is about 46043.6871134361. The cubic root of 2120021123 is about 1284.6359242509.

Adding to 2120021123 its reverse (3211200212), we get a palindrome (5331221335).

Subtracting 2120021123 from its reverse (3211200212), we obtain a square (1091179089 = 33033²).

The spelling of 2120021123 in words is "two billion, one hundred twenty million, twenty-one thousand, one hundred twenty-three".