121212222103 has 32 divisors (see below), whose sum is σ = 149028618240. Its totient is φ = 96264637920.

The previous prime is 121212222097. The next prime is 121212222119. The reversal of 121212222103 is 301222212121.

It is a cyclic number.

It is not a de Polignac number, because 121212222103 - 2⁵ = 121212222071 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212222143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9814150 + ... + 9826492.

It is an arithmetic number, because the mean of its divisors is an integer number (4657144320).

Almost surely, 2^121212222103 is an apocalyptic number.

121212222103 is a deficient number, since it is larger than the sum of its proper divisors (27816396137).

121212222103 is a wasteful number, since it uses less digits than its factorization.

121212222103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13987.

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

Adding to 121212222103 its reverse (301222212121), we get a palindrome (422434434224).

The spelling of 121212222103 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred three".