121111500212 has 12 divisors (see below), whose sum is σ = 219253578180. Its totient is φ = 58467620736.

The previous prime is 121111500179. The next prime is 121111500221. The reversal of 121111500212 is 212005111121.

It can be written as a sum of positive squares in 2 ways, for example, as 92237334436 + 28874165776 = 303706^2 + 169924^2 .

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, 522032213 + ... + 522032444.

It is an arithmetic number, because the mean of its divisors is an integer number (18271131515).

Almost surely, 2^121111500212 is an apocalyptic number.

It is an amenable number.

121111500212 is a deficient number, since it is larger than the sum of its proper divisors (98142077968).

121111500212 is a wasteful number, since it uses less digits than its factorization.

121111500212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044064690 (or 1044064688 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 121111500212 its reverse (212005111121), we get a palindrome (333116611333).

The spelling of 121111500212 in words is "one hundred twenty-one billion, one hundred eleven million, five hundred thousand, two hundred twelve".