1212001100103 has 32 divisors (see below), whose sum is σ = 1748668677120. Its totient is φ = 743778754560.

The previous prime is 1212001100099. The next prime is 1212001100113. The reversal of 1212001100103 is 3010011002121.

It is not a de Polignac number, because 1212001100103 - 2² = 1212001100099 is a prime.

It is a super-2 number, since 2×1212001100103² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212001100113) 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 31 ways as a sum of consecutive naturals, for example, 3323943 + ... + 3670503.

It is an arithmetic number, because the mean of its divisors is an integer number (54645896160).

Almost surely, 2^{1212001100103} is an apocalyptic number.

1212001100103 is a deficient number, since it is larger than the sum of its proper divisors (536667577017).

1212001100103 is a wasteful number, since it uses less digits than its factorization.

1212001100103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348087.

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

Adding to 1212001100103 its reverse (3010011002121), we get a palindrome (4222012102224).

The spelling of 1212001100103 in words is "one trillion, two hundred twelve billion, one million, one hundred thousand, one hundred three".