1211121111202 has 32 divisors (see below), whose sum is σ = 2054063992320. Its totient is φ = 532535082240.

The previous prime is 1211121111143. The next prime is 1211121111203. The reversal of 1211121111202 is 2021111211121.

It is not an unprimeable number, because it can be changed into a prime (1211121111203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19781008 + ... + 19842139.

It is an arithmetic number, because the mean of its divisors is an integer number (64189499760).

Almost surely, 2^{1211121111202} is an apocalyptic number.

1211121111202 is a deficient number, since it is larger than the sum of its proper divisors (842942881118).

1211121111202 is a wasteful number, since it uses less digits than its factorization.

1211121111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39623226.

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

Adding to 1211121111202 its reverse (2021111211121), we get a palindrome (3232232322323).

The spelling of 1211121111202 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, two hundred two".