1012221111 has 8 divisors (see below), whose sum is σ = 1472321664. Its totient is φ = 613467320.

The previous prime is 1012221109. The next prime is 1012221113. The reversal of 1012221111 is 1111222101.

It is an interprime number because it is at equal distance from previous prime (1012221109) and next prime (1012221113).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1012221111 - 2¹ = 1012221109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012221113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15336651 + ... + 15336716.

It is an arithmetic number, because the mean of its divisors is an integer number (184040208).

Almost surely, 2^1012221111 is an apocalyptic number.

1012221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1012221111 is a deficient number, since it is larger than the sum of its proper divisors (460100553).

1012221111 is a wasteful number, since it uses less digits than its factorization.

1012221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30673381.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1012221111 is about 31815.4225337335. The cubic root of 1012221111 is about 1004.0572203675.

Adding to 1012221111 its reverse (1111222101), we get a palindrome (2123443212).

The spelling of 1012221111 in words is "one billion, twelve million, two hundred twenty-one thousand, one hundred eleven".