121211102011012 has 24 divisors (see below), whose sum is σ = 234007924899672. Its totient is φ = 54579107846400.

The previous prime is 121211102011003. The next prime is 121211102011019. The reversal of 121211102011012 is 210110201112121.

It can be written as a sum of positive squares in 4 ways, for example, as 3469852464516 + 117741249546496 = 1862754^2 + 10850864^2 .

It is not an unprimeable number, because it can be changed into a prime (121211102011019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28426616539 + ... + 28426620802.

It is an arithmetic number, because the mean of its divisors is an integer number (9750330204153).

Almost surely, 2^{121211102011012} is an apocalyptic number.

It is an amenable number.

121211102011012 is a deficient number, since it is larger than the sum of its proper divisors (112796822888660).

121211102011012 is a wasteful number, since it uses less digits than its factorization.

121211102011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56853237399 (or 56853237397 counting only the distinct ones).

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

Adding to 121211102011012 its reverse (210110201112121), we get a palindrome (331321303123133).

The spelling of 121211102011012 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred two million, eleven thousand, twelve".