2120125551 has 8 divisors (see below), whose sum is σ = 2827649664. Its totient is φ = 1413009240.

The previous prime is 2120125519. The next prime is 2120125559. The reversal of 2120125551 is 1555210212.

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

It is not a de Polignac number, because 2120125551 - 2⁵ = 2120125519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120125559) 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, 89605 + ... + 110766.

It is an arithmetic number, because the mean of its divisors is an integer number (353456208).

Almost surely, 2^2120125551 is an apocalyptic number.

2120125551 is a deficient number, since it is larger than the sum of its proper divisors (707524113).

2120125551 is a wasteful number, since it uses less digits than its factorization.

2120125551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203901.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 2120125551 is about 46044.8211094364. The cubic root of 2120125551 is about 1284.6570167699.

Adding to 2120125551 its reverse (1555210212), we get a palindrome (3675335763).

The spelling of 2120125551 in words is "two billion, one hundred twenty million, one hundred twenty-five thousand, five hundred fifty-one".