2012101123 has 4 divisors (see below), whose sum is σ = 2025426448. Its totient is φ = 1998775800.

The previous prime is 2012101109. The next prime is 2012101141. The reversal of 2012101123 is 3211012102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2012101123 - 2⁹ = 2012100611 is a prime.

It is a super-2 number, since 2×2012101123² = 8097101858355722258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012101153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6662436 + ... + 6662737.

It is an arithmetic number, because the mean of its divisors is an integer number (506356612).

Almost surely, 2^2012101123 is an apocalyptic number.

2012101123 is a deficient number, since it is larger than the sum of its proper divisors (13325325).

2012101123 is a wasteful number, since it uses less digits than its factorization.

2012101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13325324.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2012101123 is about 44856.4501827775. The cubic root of 2012101123 is about 1262.4570186720.

Adding to 2012101123 its reverse (3211012102), we get a palindrome (5223113225).

The spelling of 2012101123 in words is "two billion, twelve million, one hundred one thousand, one hundred twenty-three".