20121211120103 has 4 divisors (see below), whose sum is σ = 20121626475600. Its totient is φ = 20120795764608.

The previous prime is 20121211120037. The next prime is 20121211120111. The reversal of 20121211120103 is 30102111212102.

It is a happy number.

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 20121211120103 - 2³⁰ = 20120137378279 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 (20121211120303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207605075 + ... + 207701972.

It is an arithmetic number, because the mean of its divisors is an integer number (5030406618900).

Almost surely, 2^{20121211120103} is an apocalyptic number.

20121211120103 is a deficient number, since it is larger than the sum of its proper divisors (415355497).

20121211120103 is an equidigital number, since it uses as much as digits as its factorization.

20121211120103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415355496.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20121211120103 its reverse (30102111212102), we get a palindrome (50223322332205).

The spelling of 20121211120103 in words is "twenty trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred three".