1012112201 has 4 divisors (see below), whose sum is σ = 1012193412. Its totient is φ = 1012030992.

The previous prime is 1012112191. The next prime is 1012112203. The reversal of 1012112201 is 1022112101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1022112101 = 1811 ⋅564391.

It can be written as a sum of positive squares in 2 ways, for example, as 58537801 + 953574400 = 7651^2 + 30880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012112201 is a prime.

It is a super-2 number, since 2×1012112201² = 2048742214826128802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012112203) 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, 17546 + ... + 48291.

It is an arithmetic number, because the mean of its divisors is an integer number (253048353).

Almost surely, 2^1012112201 is an apocalyptic number.

It is an amenable number.

1012112201 is a deficient number, since it is larger than the sum of its proper divisors (81211).

1012112201 is an equidigital number, since it uses as much as digits as its factorization.

1012112201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81210.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1012112201 is about 31813.7108964044. The cubic root of 1012112201 is about 1004.0212085407.

Adding to 1012112201 its reverse (1022112101), we get a palindrome (2034224302).

It can be divided in two parts, 10121 and 12201, that added together give a palindrome (22322).

The spelling of 1012112201 in words is "one billion, twelve million, one hundred twelve thousand, two hundred one".