1042550541221 has 32 divisors (see below), whose sum is σ = 1224104265216. Its totient is φ = 869281920000.

The previous prime is 1042550541217. The next prime is 1042550541229. The reversal of 1042550541221 is 1221450552401.

It is a cyclic number.

It is not a de Polignac number, because 1042550541221 - 2² = 1042550541217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042550541229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182868671 + ... + 182874371.

It is an arithmetic number, because the mean of its divisors is an integer number (38253258288).

Almost surely, 2^{1042550541221} is an apocalyptic number.

It is an amenable number.

1042550541221 is a deficient number, since it is larger than the sum of its proper divisors (181553723995).

1042550541221 is a wasteful number, since it uses less digits than its factorization.

1042550541221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7493.

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 1042550541221 in words is "one trillion, forty-two billion, five hundred fifty million, five hundred forty-one thousand, two hundred twenty-one".