221345543122 has 32 divisors (see below), whose sum is σ = 388362366720. Its totient is φ = 93494618880.

The previous prime is 221345543087. The next prime is 221345543137.

221345543122 is nontrivially palindromic in base 10.

It is a super-5 number, since 5×221345543122⁵ (a number of 58 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3716233 + ... + 3775324.

It is an arithmetic number, because the mean of its divisors is an integer number (12136323960).

Almost surely, 2^221345543122 is an apocalyptic number.

221345543122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221345543122 is a deficient number, since it is larger than the sum of its proper divisors (167016823598).

221345543122 is a wasteful number, since it uses less digits than its factorization.

221345543122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7491666.

The product of its digits is 57600, while the sum is 34.

It can be divided in two parts, 221345 and 543122, that added together give a palindrome (764467).

The spelling of 221345543122 in words is "two hundred twenty-one billion, three hundred forty-five million, five hundred forty-three thousand, one hundred twenty-two".