1012222111 has 4 divisors (see below), whose sum is σ = 1056231792. Its totient is φ = 968212432.

The previous prime is 1012222087. The next prime is 1012222117. The reversal of 1012222111 is 1112222101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012222111 - 2²¹ = 1010124959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012222091 and 1012222100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012222117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22004806 + ... + 22004851.

It is an arithmetic number, because the mean of its divisors is an integer number (264057948).

Almost surely, 2^1012222111 is an apocalyptic number.

1012222111 is a deficient number, since it is larger than the sum of its proper divisors (44009681).

1012222111 is an equidigital number, since it uses as much as digits as its factorization.

1012222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44009680.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1012222111 is about 31815.4382493782. The cubic root of 1012222111 is about 1004.0575510123.

Adding to 1012222111 its reverse (1112222101), we get a palindrome (2124444212).

The spelling of 1012222111 in words is "one billion, twelve million, two hundred twenty-two thousand, one hundred eleven".