1211201113 has 8 divisors (see below), whose sum is σ = 1281424320. Its totient is φ = 1141625520.

The previous prime is 1211201107. The next prime is 1211201207. The reversal of 1211201113 is 3111021121.

It is a happy number.

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 1211201113 - 2¹⁷ = 1211070041 is a prime.

It is a super-2 number, since 2×1211201113² = 2934016272264877538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211201093 and 1211201102.

It is not an unprimeable number, because it can be changed into a prime (1211205113) 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, 158053 + ... + 165538.

It is an arithmetic number, because the mean of its divisors is an integer number (160178040).

Almost surely, 2^1211201113 is an apocalyptic number.

It is an amenable number.

1211201113 is a deficient number, since it is larger than the sum of its proper divisors (70223207).

1211201113 is a wasteful number, since it uses less digits than its factorization.

1211201113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323807.

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

The square root of 1211201113 is about 34802.3147649693. The cubic root of 1211201113 is about 1065.9547120917.

Adding to 1211201113 its reverse (3111021121), we get a palindrome (4322222234).

The spelling of 1211201113 in words is "one billion, two hundred eleven million, two hundred one thousand, one hundred thirteen".