1212200223311 has 32 divisors (see below), whose sum is σ = 1552392787968. Its totient is φ = 919130077440.

The previous prime is 1212200223301. The next prime is 1212200223317. The reversal of 1212200223311 is 1133220022121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212200223311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212200223317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 341990 + ... + 1594163.

It is an arithmetic number, because the mean of its divisors is an integer number (48512274624).

Almost surely, 2^{1212200223311} is an apocalyptic number.

1212200223311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212200223311 is a deficient number, since it is larger than the sum of its proper divisors (340192564657).

1212200223311 is a wasteful number, since it uses less digits than its factorization.

1212200223311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936391.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1212200223311 its reverse (1133220022121), we get a palindrome (2345420245432).

The spelling of 1212200223311 in words is "one trillion, two hundred twelve billion, two hundred million, two hundred twenty-three thousand, three hundred eleven".