121212111896 has 8 divisors (see below), whose sum is σ = 227272709820. Its totient is φ = 60606055944.

The previous prime is 121212111869. The next prime is 121212111899. The reversal of 121212111896 is 698111212121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212111899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7575756986 + ... + 7575757001.

Almost surely, 2^121212111896 is an apocalyptic number.

It is an amenable number.

121212111896 is a deficient number, since it is larger than the sum of its proper divisors (106060597924).

121212111896 is a wasteful number, since it uses less digits than its factorization.

121212111896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15151513993 (or 15151513989 counting only the distinct ones).

The product of its digits is 3456, while the sum is 35.

The spelling of 121212111896 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, eight hundred ninety-six".