1212200120011 has 4 divisors (see below), whose sum is σ = 1213415968672. Its totient is φ = 1210984271352.

The previous prime is 1212200119979. The next prime is 1212200120057. The reversal of 1212200120011 is 1100210022121.

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 1212200120011 - 2⁵ = 1212200119979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212200119973 and 1212200120000.

It is not an unprimeable number, because it can be changed into a prime (1212200120711) 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, 607922835 + ... + 607924828.

It is an arithmetic number, because the mean of its divisors is an integer number (303353992168).

Almost surely, 2^{1212200120011} is an apocalyptic number.

1212200120011 is a deficient number, since it is larger than the sum of its proper divisors (1215848661).

1212200120011 is an equidigital number, since it uses as much as digits as its factorization.

1212200120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215848660.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212200120011 its reverse (1100210022121), we get a palindrome (2312410142132).

The spelling of 1212200120011 in words is "one trillion, two hundred twelve billion, two hundred million, one hundred twenty thousand, eleven".