220145521012 has 6 divisors (see below), whose sum is σ = 385254661778. Its totient is φ = 110072760504.

The previous prime is 220145520971. The next prime is 220145521033. The reversal of 220145521012 is 210125541022.

It can be written as a sum of positive squares in only one way, i.e., 153847510756 + 66298010256 = 392234^2 + 257484^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27518190123 + ... + 27518190130.

Almost surely, 2^220145521012 is an apocalyptic number.

It is an amenable number.

220145521012 is a deficient number, since it is larger than the sum of its proper divisors (165109140766).

220145521012 is a wasteful number, since it uses less digits than its factorization.

220145521012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55036380257 (or 55036380255 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The spelling of 220145521012 in words is "two hundred twenty billion, one hundred forty-five million, five hundred twenty-one thousand, twelve".