201111220121012 has 6 divisors (see below), whose sum is σ = 351944635211778. Its totient is φ = 100555610060504.

The previous prime is 201111220120963. The next prime is 201111220121023. The reversal of 201111220121012 is 210121022111102.

It can be written as a sum of positive squares in only one way, i.e., 173373154431376 + 27738065689636 = 13167124^2 + 5266694^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25138902515123 + ... + 25138902515130.

It is an arithmetic number, because the mean of its divisors is an integer number (58657439201963).

Almost surely, 2^{201111220121012} is an apocalyptic number.

It is an amenable number.

201111220121012 is a deficient number, since it is larger than the sum of its proper divisors (150833415090766).

201111220121012 is a wasteful number, since it uses less digits than its factorization.

201111220121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50277805030257 (or 50277805030255 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201111220121012 its reverse (210121022111102), we get a palindrome (411232242232114).

The spelling of 201111220121012 in words is "two hundred one trillion, one hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, twelve".