2151121223 has 8 divisors (see below), whose sum is σ = 2182302000. Its totient is φ = 2120153728.

The previous prime is 2151121187. The next prime is 2151121241. The reversal of 2151121223 is 3221211512.

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 2151121223 - 2¹⁰ = 2151120199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151121195 and 2151121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151121243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32948 + ... + 73401.

It is an arithmetic number, because the mean of its divisors is an integer number (272787750).

Almost surely, 2^2151121223 is an apocalyptic number.

2151121223 is a deficient number, since it is larger than the sum of its proper divisors (31180777).

2151121223 is a wasteful number, since it uses less digits than its factorization.

2151121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106641.

The product of its digits is 240, while the sum is 20.

The square root of 2151121223 is about 46380.1813601456. The cubic root of 2151121223 is about 1290.8872015147.

Adding to 2151121223 its reverse (3221211512), we get a palindrome (5372332735).

The spelling of 2151121223 in words is "two billion, one hundred fifty-one million, one hundred twenty-one thousand, two hundred twenty-three".