1213120011 has 8 divisors (see below), whose sum is σ = 1618194240. Its totient is φ = 808396232.

The previous prime is 1213119991. The next prime is 1213120039. The reversal of 1213120011 is 1100213121.

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 1213120011 - 2⁵ = 1213119979 is a prime.

It is a super-2 number, since 2×1213120011² = 2943320322177280242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213120081) 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, 79425 + ... + 93458.

It is an arithmetic number, because the mean of its divisors is an integer number (202274280).

Almost surely, 2^1213120011 is an apocalyptic number.

1213120011 is a deficient number, since it is larger than the sum of its proper divisors (405074229).

1213120011 is a wasteful number, since it uses less digits than its factorization.

1213120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175225.

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

The square root of 1213120011 is about 34829.8723942538. The cubic root of 1213120011 is about 1066.5173434309.

Adding to 1213120011 its reverse (1100213121), we get a palindrome (2313333132).

The spelling of 1213120011 in words is "one billion, two hundred thirteen million, one hundred twenty thousand, eleven".