1355433510221 has 16 divisors (see below), whose sum is σ = 1550148019200. Its totient is φ = 1160989589760.

The previous prime is 1355433510161. The next prime is 1355433510247. The reversal of 1355433510221 is 1220153345531.

It is a happy number.

It is not a de Polignac number, because 1355433510221 - 2⁶ = 1355433510157 is a prime.

It is a super-2 number, since 2×1355433510221² (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 (1355433510121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74232725 + ... + 74250981.

It is an arithmetic number, because the mean of its divisors is an integer number (96884251200).

Almost surely, 2^{1355433510221} is an apocalyptic number.

It is an amenable number.

1355433510221 is a deficient number, since it is larger than the sum of its proper divisors (194714508979).

1355433510221 is a wasteful number, since it uses less digits than its factorization.

1355433510221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25084.

The product of its (nonzero) digits is 54000, while the sum is 35.

Adding to 1355433510221 its reverse (1220153345531), we get a palindrome (2575586855752).

The spelling of 1355433510221 in words is "one trillion, three hundred fifty-five billion, four hundred thirty-three million, five hundred ten thousand, two hundred twenty-one".