1211302113 has 16 divisors (see below), whose sum is σ = 1851380736. Its totient is φ = 690077520.

The previous prime is 1211302097. The next prime is 1211302123. The reversal of 1211302113 is 3112031121.

It is a happy number.

It is not a de Polignac number, because 1211302113 - 2⁴ = 1211302097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211302092 and 1211302101.

It is not an unprimeable number, because it can be changed into a prime (1211302123) 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, 80181 + ... + 94082.

It is an arithmetic number, because the mean of its divisors is an integer number (115711296).

Almost surely, 2^1211302113 is an apocalyptic number.

It is an amenable number.

1211302113 is a deficient number, since it is larger than the sum of its proper divisors (640078623).

1211302113 is a wasteful number, since it uses less digits than its factorization.

1211302113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174604.

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

The square root of 1211302113 is about 34803.7657876271. The cubic root of 1211302113 is about 1065.9843406514.

Adding to 1211302113 its reverse (3112031121), we get a palindrome (4323333234).

The spelling of 1211302113 in words is "one billion, two hundred eleven million, three hundred two thousand, one hundred thirteen".