1012211113 has 4 divisors (see below), whose sum is σ = 1013743108. Its totient is φ = 1010679120.

The previous prime is 1012211107. The next prime is 1012211131. The reversal of 1012211113 is 3111122101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3111122101 = 53 ⋅58700417.

It can be written as a sum of positive squares in 2 ways, for example, as 401281024 + 610930089 = 20032^2 + 24717^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012211113 - 2²⁵ = 978656681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012211093 and 1012211102.

It is not an unprimeable number, because it can be changed into a prime (1012211153) 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, 765006 + ... + 766327.

It is an arithmetic number, because the mean of its divisors is an integer number (253435777).

Almost surely, 2^1012211113 is an apocalyptic number.

It is an amenable number.

1012211113 is a deficient number, since it is larger than the sum of its proper divisors (1531995).

1012211113 is an equidigital number, since it uses as much as digits as its factorization.

1012211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531994.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1012211113 is about 31815.2654082910. The cubic root of 1012211113 is about 1004.0539145690.

Adding to 1012211113 its reverse (3111122101), we get a palindrome (4123333214).

The spelling of 1012211113 in words is "one billion, twelve million, two hundred eleven thousand, one hundred thirteen".