111221147302638 has 16 divisors (see below), whose sum is σ = 222442632372816. Its totient is φ = 37073659472960.

The previous prime is 111221147302631. The next prime is 111221147302669. The reversal of 111221147302638 is 836203741122111.

It is a self number, because there is not a number n which added to its sum of digits gives 111221147302638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221147302631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9687831 + ... + 17784722.

It is an arithmetic number, because the mean of its divisors is an integer number (13902664523301).

Almost surely, 2^{111221147302638} is an apocalyptic number.

111221147302638 is an abundant number, since it is smaller than the sum of its proper divisors (111221485070178).

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

111221147302638 is a wasteful number, since it uses less digits than its factorization.

111221147302638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28147299.

The product of its (nonzero) digits is 96768, while the sum is 42.

Adding to 111221147302638 its reverse (836203741122111), we get a palindrome (947424888424749).

The spelling of 111221147302638 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred forty-seven million, three hundred two thousand, six hundred thirty-eight".