121221212012 has 12 divisors (see below), whose sum is σ = 212303251440. Its totient is φ = 60563140176.

The previous prime is 121221212009. The next prime is 121221212023. The reversal of 121221212012 is 210212122121.

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, 11860712 + ... + 11870927.

It is an arithmetic number, because the mean of its divisors is an integer number (17691937620).

Almost surely, 2^121221212012 is an apocalyptic number.

It is an amenable number.

121221212012 is a deficient number, since it is larger than the sum of its proper divisors (91082039428).

121221212012 is a wasteful number, since it uses less digits than its factorization.

121221212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23732920 (or 23732918 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121221212012 its reverse (210212122121), we get a palindrome (331433334133).

The spelling of 121221212012 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, twelve".