2121201123 has 16 divisors (see below), whose sum is σ = 2843904000. Its totient is φ = 1406331360.

The previous prime is 2121201119. The next prime is 2121201161. The reversal of 2121201123 is 3211021212.

It is not a de Polignac number, because 2121201123 - 2² = 2121201119 is a prime.

It is a super-2 number, since 2×2121201123² = 8998988408432922258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121201193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1009528 + ... + 1011626.

It is an arithmetic number, because the mean of its divisors is an integer number (177744000).

Almost surely, 2^2121201123 is an apocalyptic number.

2121201123 is a deficient number, since it is larger than the sum of its proper divisors (722702877).

2121201123 is a wasteful number, since it uses less digits than its factorization.

2121201123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2121201123 is about 46056.4992482060. The cubic root of 2121201123 is about 1284.8742220706.

Adding to 2121201123 its reverse (3211021212), we get a palindrome (5332222335).

The spelling of 2121201123 in words is "two billion, one hundred twenty-one million, two hundred one thousand, one hundred twenty-three".