1043201555221 has 64 divisors (see below), whose sum is σ = 1237109760000. Its totient is φ = 861404544000.

The previous prime is 1043201555213. The next prime is 1043201555233. The reversal of 1043201555221 is 1225551023401.

It is not a de Polignac number, because 1043201555221 - 2³ = 1043201555213 is a prime.

It is a super-2 number, since 2×1043201555221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043201555251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2090584030 + ... + 2090584528.

It is an arithmetic number, because the mean of its divisors is an integer number (19329840000).

Almost surely, 2^{1043201555221} is an apocalyptic number.

It is an amenable number.

1043201555221 is a deficient number, since it is larger than the sum of its proper divisors (193908204779).

1043201555221 is a wasteful number, since it uses less digits than its factorization.

1043201555221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 1043201555221 its reverse (1225551023401), we get a palindrome (2268752578622).

The spelling of 1043201555221 in words is "one trillion, forty-three billion, two hundred one million, five hundred fifty-five thousand, two hundred twenty-one".