1212200001031 has 4 divisors (see below), whose sum is σ = 1212203438200. Its totient is φ = 1212196563864.

The previous prime is 1212200001017. The next prime is 1212200001037. The reversal of 1212200001031 is 1301000022121.

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 1212200001031 - 2¹¹ = 1212199998983 is a prime.

It is a super-2 number, since 2×1212200001031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212200001037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120101 + ... + 1918078.

It is an arithmetic number, because the mean of its divisors is an integer number (303050859550).

Almost surely, 2^{1212200001031} is an apocalyptic number.

1212200001031 is a deficient number, since it is larger than the sum of its proper divisors (3437169).

1212200001031 is an equidigital number, since it uses as much as digits as its factorization.

1212200001031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437168.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1212200001031 its reverse (1301000022121), we get a palindrome (2513200023152).

The spelling of 1212200001031 in words is "one trillion, two hundred twelve billion, two hundred million, one thousand, thirty-one".