1212021102403 has 16 divisors (see below), whose sum is σ = 1277980704000. Its totient is φ = 1146280053600.

The previous prime is 1212021102377. The next prime is 1212021102419. The reversal of 1212021102403 is 3042011202121.

It is a cyclic number.

It is not a de Polignac number, because 1212021102403 - 2⁹ = 1212021101891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212028102403) 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, 27905698 + ... + 27949096.

It is an arithmetic number, because the mean of its divisors is an integer number (79873794000).

Almost surely, 2^{1212021102403} is an apocalyptic number.

1212021102403 is a deficient number, since it is larger than the sum of its proper divisors (65959601597).

1212021102403 is a wasteful number, since it uses less digits than its factorization.

1212021102403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45882.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1212021102403 its reverse (3042011202121), we get a palindrome (4254032304524).

The spelling of 1212021102403 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred two thousand, four hundred three".