1111012222221 has 32 divisors (see below), whose sum is σ = 1873643811840. Its totient is φ = 644065052400.

The previous prime is 1111012222219. The next prime is 1111012222231. The reversal of 1111012222221 is 1222222101111.

It is not a de Polignac number, because 1111012222221 - 2¹ = 1111012222219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111012222194 and 1111012222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111012222231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81314515 + ... + 81328176.

It is an arithmetic number, because the mean of its divisors is an integer number (58551369120).

Almost surely, 2^{1111012222221} is an apocalyptic number.

1111012222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111012222221 is a deficient number, since it is larger than the sum of its proper divisors (762631589619).

1111012222221 is a wasteful number, since it uses less digits than its factorization.

1111012222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162642734 (or 162642728 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1111012222221 its reverse (1222222101111), we get a palindrome (2333234323332).

The spelling of 1111012222221 in words is "one trillion, one hundred eleven billion, twelve million, two hundred twenty-two thousand, two hundred twenty-one".