121212202103 has 16 divisors (see below), whose sum is σ = 128334671520. Its totient is φ = 114287048064.

The previous prime is 121212202073. The next prime is 121212202117. The reversal of 121212202103 is 301202212121.

It is a cyclic number.

It is not a de Polignac number, because 121212202103 - 2¹⁰ = 121212201079 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 (121212202183) 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, 9886325 + ... + 9898577.

It is an arithmetic number, because the mean of its divisors is an integer number (8020916970).

Almost surely, 2^121212202103 is an apocalyptic number.

121212202103 is a deficient number, since it is larger than the sum of its proper divisors (7122469417).

121212202103 is a wasteful number, since it uses less digits than its factorization.

121212202103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20258.

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

Adding to 121212202103 its reverse (301202212121), we get a palindrome (422414414224).

The spelling of 121212202103 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, one hundred three".