1111221320542 has 16 divisors (see below), whose sum is σ = 1677684723552. Its totient is φ = 551994075360.

The previous prime is 1111221320509. The next prime is 1111221320551. The reversal of 1111221320542 is 2450231221111.

It is a super-2 number, since 2×1111221320542² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2019567 + ... + 2510197.

It is an arithmetic number, because the mean of its divisors is an integer number (104855295222).

Almost surely, 2^{1111221320542} is an apocalyptic number.

1111221320542 is a deficient number, since it is larger than the sum of its proper divisors (566463403010).

1111221320542 is a wasteful number, since it uses less digits than its factorization.

1111221320542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498003.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 1111221320542 its reverse (2450231221111), we get a palindrome (3561452541653).

The spelling of 1111221320542 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, three hundred twenty thousand, five hundred forty-two".