1212210220103 has 4 divisors (see below), whose sum is σ = 1212663046920. Its totient is φ = 1211757393288.

The previous prime is 1212210220099. The next prime is 1212210220147. The reversal of 1212210220103 is 3010220122121.

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 1212210220103 - 2² = 1212210220099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212210220153) 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 3 ways as a sum of consecutive naturals, for example, 226409393 + ... + 226414746.

It is an arithmetic number, because the mean of its divisors is an integer number (303165761730).

Almost surely, 2^{1212210220103} is an apocalyptic number.

1212210220103 is a deficient number, since it is larger than the sum of its proper divisors (452826817).

1212210220103 is an equidigital number, since it uses as much as digits as its factorization.

1212210220103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452826816.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1212210220103 its reverse (3010220122121), we get a palindrome (4222430342224).

The spelling of 1212210220103 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty thousand, one hundred three".