1053261221 has 8 divisors (see below), whose sum is σ = 1078206624. Its totient is φ = 1028336400.

The previous prime is 1053261217. The next prime is 1053261269. The reversal of 1053261221 is 1221623501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1053261221 - 2² = 1053261217 is a prime.

It is a super-2 number, since 2×1053261221² = 2218718399324821682, which 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 (1053261271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160046 + ... + 166496.

It is an arithmetic number, because the mean of its divisors is an integer number (134775828).

Almost surely, 2^1053261221 is an apocalyptic number.

It is an amenable number.

1053261221 is a deficient number, since it is larger than the sum of its proper divisors (24945403).

1053261221 is an equidigital number, since it uses as much as digits as its factorization.

1053261221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10291.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1053261221 is about 32453.9862112499. The cubic root of 1053261221 is about 1017.4475527905.

Adding to 1053261221 its reverse (1221623501), we get a palindrome (2274884722).

The spelling of 1053261221 in words is "one billion, fifty-three million, two hundred sixty-one thousand, two hundred twenty-one".