2142121123 has 8 divisors (see below), whose sum is σ = 2352902400. Its totient is φ = 1941143688.

The previous prime is 2142121117. The next prime is 2142121127. The reversal of 2142121123 is 3211212412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142121123 is a prime.

It is a super-2 number, since 2×2142121123² = 9177365811205562258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2142121123.

It is not an unprimeable number, because it can be changed into a prime (2142121127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2450503 + ... + 2451376.

It is an arithmetic number, because the mean of its divisors is an integer number (294112800).

Almost surely, 2^2142121123 is an apocalyptic number.

2142121123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2142121123 is a deficient number, since it is larger than the sum of its proper divisors (210781277).

2142121123 is a wasteful number, since it uses less digits than its factorization.

2142121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901921.

The product of its digits is 192, while the sum is 19.

The square root of 2142121123 is about 46283.0543827868. The cubic root of 2142121123 is about 1289.0843657660.

Adding to 2142121123 its reverse (3211212412), we get a palindrome (5353333535).

The spelling of 2142121123 in words is "two billion, one hundred forty-two million, one hundred twenty-one thousand, one hundred twenty-three".