1211230113 has 16 divisors (see below), whose sum is σ = 1661481600. Its totient is φ = 784308096.

The previous prime is 1211230079. The next prime is 1211230121. The reversal of 1211230113 is 3110321121.

It is a happy number.

It is not a de Polignac number, because 1211230113 - 2⁸ = 1211229857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211230092 and 1211230101.

It is not an unprimeable number, because it can be changed into a prime (1211230123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57381 + ... + 75597.

It is an arithmetic number, because the mean of its divisors is an integer number (103842600).

Almost surely, 2^1211230113 is an apocalyptic number.

It is an amenable number.

1211230113 is a deficient number, since it is larger than the sum of its proper divisors (450251487).

1211230113 is a wasteful number, since it uses less digits than its factorization.

1211230113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18856.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1211230113 is about 34802.7314014288. The cubic root of 1211230113 is about 1065.9632194705.

Adding to 1211230113 its reverse (3110321121), we get a palindrome (4321551234).

The spelling of 1211230113 in words is "one billion, two hundred eleven million, two hundred thirty thousand, one hundred thirteen".