2121145250 has 256 divisors, whose sum is σ = 5162766336. Its totient is φ = 635904000.

The previous prime is 2121145241. The next prime is 2121145259. The reversal of 2121145250 is 525411212.

It is an interprime number because it is at equal distance from previous prime (2121145241) and next prime (2121145259).

It is not an unprimeable number, because it can be changed into a prime (2121145259) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 45130727 + ... + 45130773.

It is an arithmetic number, because the mean of its divisors is an integer number (20167056).

Almost surely, 2^2121145250 is an apocalyptic number.

2121145250 is an abundant number, since it is smaller than the sum of its proper divisors (3041621086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121145250 is a wasteful number, since it uses less digits than its factorization.

2121145250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2121145250 is about 46055.8926740108. The cubic root of 2121145250 is about 1284.8629406623.

Adding to 2121145250 its reverse (525411212), we get a palindrome (2646556462).

The spelling of 2121145250 in words is "two billion, one hundred twenty-one million, one hundred forty-five thousand, two hundred fifty".