11231221020354 has 40 divisors (see below), whose sum is σ = 25166567682828. Its totient is φ = 3743693752320.

The previous prime is 11231221020353. The next prime is 11231221020367. The reversal of 11231221020354 is 45302012213211.

It is a happy number.

11231221020354 is a `hidden beast` number, since 1 + 1 + 231 + 221 + 0 + 203 + 5 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11080090570329 + 151130450025 = 3328677^2 + 388755^2 .

It is a super-2 number, since 2×11231221020354² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11231221020353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14141794 + ... + 14914850.

Almost surely, 2^{11231221020354} is an apocalyptic number.

11231221020354 is an abundant number, since it is smaller than the sum of its proper divisors (13935346662474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231221020354 is an equidigital number, since it uses as much as digits as its factorization.

11231221020354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862752 (or 862743 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 11231221020354 its reverse (45302012213211), we get a palindrome (56533233233565).

The spelling of 11231221020354 in words is "eleven trillion, two hundred thirty-one billion, two hundred twenty-one million, twenty thousand, three hundred fifty-four".