1212123422403 has 16 divisors (see below), whose sum is σ = 1796523688960. Its totient is φ = 807728903208.

The previous prime is 1212123422369. The next prime is 1212123422407. The reversal of 1212123422403 is 3042243212121.

1212123422403 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 1 + 234 + 22 + 403 = 666.

It is not a de Polignac number, because 1212123422403 - 2⁹ = 1212123421891 is a prime.

It is a super-2 number, since 2×1212123422403² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212123422407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9753175 + ... + 9876672.

It is an arithmetic number, because the mean of its divisors is an integer number (112282730560).

Almost surely, 2^{1212123422403} is an apocalyptic number.

1212123422403 is a deficient number, since it is larger than the sum of its proper divisors (584400266557).

1212123422403 is a wasteful number, since it uses less digits than its factorization.

1212123422403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19632143 (or 19632137 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1212123422403 its reverse (3042243212121), we get a palindrome (4254366634524).

The spelling of 1212123422403 in words is "one trillion, two hundred twelve billion, one hundred twenty-three million, four hundred twenty-two thousand, four hundred three".