1212102011 has 4 divisors (see below), whose sum is σ = 1212399000. Its totient is φ = 1211805024.

The previous prime is 1212101963. The next prime is 1212102013. The reversal of 1212102011 is 1102012121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212102011 - 2²² = 1207907707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212101983 and 1212102001.

It is not an unprimeable number, because it can be changed into a prime (1212102013) 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, 142286 + ... + 150563.

It is an arithmetic number, because the mean of its divisors is an integer number (303099750).

Almost surely, 2^1212102011 is an apocalyptic number.

1212102011 is a deficient number, since it is larger than the sum of its proper divisors (296989).

1212102011 is an equidigital number, since it uses as much as digits as its factorization.

1212102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296988.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1212102011 is about 34815.2554349383. The cubic root of 1212102011 is about 1066.2189342373.

Adding to 1212102011 its reverse (1102012121), we get a palindrome (2314114132).

The spelling of 1212102011 in words is "one billion, two hundred twelve million, one hundred two thousand, eleven".