121212121012 has 12 divisors (see below), whose sum is σ = 215108834976. Its totient is φ = 59752453880.

The previous prime is 121212121007. The next prime is 121212121153. The reversal of 121212121012 is 210121212121.

121212121012 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213401338 + ... + 213401905.

It is an arithmetic number, because the mean of its divisors is an integer number (17925736248).

Almost surely, 2^121212121012 is an apocalyptic number.

It is an amenable number.

121212121012 is a deficient number, since it is larger than the sum of its proper divisors (93896713964).

121212121012 is a wasteful number, since it uses less digits than its factorization.

121212121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426803318 (or 426803316 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121212121012 its reverse (210121212121), we get a palindrome (331333333133).

The spelling of 121212121012 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, twelve".