2117122450 has 12 divisors (see below), whose sum is σ = 3937847850. Its totient is φ = 846848960.

The previous prime is 2117122439. The next prime is 2117122451. The reversal of 2117122450 is 542217112.

It can be written as a sum of positive squares in 3 ways, for example, as 1511421129 + 605701321 = 38877^2 + 24611^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (2117122451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21171175 + ... + 21171274.

Almost surely, 2^2117122450 is an apocalyptic number.

2117122450 is a deficient number, since it is larger than the sum of its proper divisors (1820725400).

2117122450 is a wasteful number, since it uses less digits than its factorization.

2117122450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42342461 (or 42342456 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2117122450 is about 46012.1989259370. The cubic root of 2117122450 is about 1284.0501694116.

Adding to 2117122450 its reverse (542217112), we get a palindrome (2659339562).

The spelling of 2117122450 in words is "two billion, one hundred seventeen million, one hundred twenty-two thousand, four hundred fifty".