2102431123 has 32 divisors (see below), whose sum is σ = 2457713664. Its totient is φ = 1781125632.

The previous prime is 2102431099. The next prime is 2102431139. The reversal of 2102431123 is 3211342012.

It is a happy number.

It is not a de Polignac number, because 2102431123 - 2⁹ = 2102430611 is a prime.

It is a super-2 number, since 2×2102431123² = 8840433253918082258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2102431123.

It is not an unprimeable number, because it can be changed into a prime (2102431153) 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, 1583686 + ... + 1585012.

It is an arithmetic number, because the mean of its divisors is an integer number (76803552).

Almost surely, 2^2102431123 is an apocalyptic number.

2102431123 is a deficient number, since it is larger than the sum of its proper divisors (355282541).

2102431123 is a wasteful number, since it uses less digits than its factorization.

2102431123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2102431123 is about 45852.2750035372. The cubic root of 2102431123 is about 1281.0731403613.

Adding to 2102431123 its reverse (3211342012), we get a palindrome (5313773135).

The spelling of 2102431123 in words is "two billion, one hundred two million, four hundred thirty-one thousand, one hundred twenty-three".