2221122543250 has 64 divisors (see below), whose sum is σ = 4741182167904. Its totient is φ = 771865190400.

The previous prime is 2221122543223. The next prime is 2221122543287. The reversal of 2221122543250 is 523452211222.

It can be written as a sum of positive squares in 16 ways, for example, as 1299674601 + 2219822868649 = 36051^2 + 1489907^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20045407 + ... + 20155906.

Almost surely, 2^{2221122543250} is an apocalyptic number.

2221122543250 is an abundant number, since it is smaller than the sum of its proper divisors (2520059624654).

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

2221122543250 is a wasteful number, since it uses less digits than its factorization.

2221122543250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40201360 (or 40201350 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 2221122543250 its reverse (523452211222), we get a palindrome (2744574754472).

The spelling of 2221122543250 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, five hundred forty-three thousand, two hundred fifty".