1213032011 has 4 divisors (see below), whose sum is σ = 1221759000. Its totient is φ = 1204305024.

The previous prime is 1213031999. The next prime is 1213032017. The reversal of 1213032011 is 1102303121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1102303121 = 1913 ⋅576217.

It is a cyclic number.

It is not a de Polignac number, because 1213032011 - 2²⁶ = 1145923147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213032017) 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, 4363286 + ... + 4363563.

It is an arithmetic number, because the mean of its divisors is an integer number (305439750).

Almost surely, 2^1213032011 is an apocalyptic number.

1213032011 is a deficient number, since it is larger than the sum of its proper divisors (8726989).

1213032011 is an equidigital number, since it uses as much as digits as its factorization.

1213032011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8726988.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1213032011 is about 34828.6090879323. The cubic root of 1213032011 is about 1066.4915543375.

Adding to 1213032011 its reverse (1102303121), we get a palindrome (2315335132).

The spelling of 1213032011 in words is "one billion, two hundred thirteen million, thirty-two thousand, eleven".