2151121451123 has 8 divisors (see below), whose sum is σ = 2191734308736. Its totient is φ = 2110509544000.

The previous prime is 2151121451119. The next prime is 2151121451173. The reversal of 2151121451123 is 3211541211512.

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

It is a cyclic number.

It is not a de Polignac number, because 2151121451123 - 2² = 2151121451119 is a prime.

It is a super-2 number, since 2×2151121451123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151121451173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5735198 + ... + 6098748.

It is an arithmetic number, because the mean of its divisors is an integer number (273966788592).

Almost surely, 2^{2151121451123} is an apocalyptic number.

2151121451123 is a deficient number, since it is larger than the sum of its proper divisors (40612857613).

2151121451123 is a wasteful number, since it uses less digits than its factorization.

2151121451123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475245.

The product of its digits is 2400, while the sum is 29.

Adding to 2151121451123 its reverse (3211541211512), we get a palindrome (5362662662635).

The spelling of 2151121451123 in words is "two trillion, one hundred fifty-one billion, one hundred twenty-one million, four hundred fifty-one thousand, one hundred twenty-three".