2151225111 has 8 divisors (see below), whose sum is σ = 3278057344. Its totient is φ = 1229271480.

The previous prime is 2151225107. The next prime is 2151225149. The reversal of 2151225111 is 1115221512.

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

It is not a de Polignac number, because 2151225111 - 2² = 2151225107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 102439291 = 2151225111 / (2 + 1 + 5 + 1 + 2 + 2 + 5 + 1 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151225311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51219625 + ... + 51219666.

It is an arithmetic number, because the mean of its divisors is an integer number (409757168).

Almost surely, 2^2151225111 is an apocalyptic number.

2151225111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2151225111 is a deficient number, since it is larger than the sum of its proper divisors (1126832233).

2151225111 is a wasteful number, since it uses less digits than its factorization.

2151225111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102439301.

The product of its digits is 200, while the sum is 21.

The square root of 2151225111 is about 46381.3013077469. The cubic root of 2151225111 is about 1290.9079822328.

Adding to 2151225111 its reverse (1115221512), we get a palindrome (3266446623).

The spelling of 2151225111 in words is "two billion, one hundred fifty-one million, two hundred twenty-five thousand, one hundred eleven".