121021311311121 has 16 divisors (see below), whose sum is σ = 173776602787200. Its totient is φ = 74473619320320.

The previous prime is 121021311311119. The next prime is 121021311311141. The reversal of 121021311311121 is 121113113120121.

It is not a de Polignac number, because 121021311311121 - 2¹ = 121021311311119 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121021311311141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18687021 + ... + 24315578.

It is an arithmetic number, because the mean of its divisors is an integer number (10861037674200).

Almost surely, 2^{121021311311121} is an apocalyptic number.

It is an amenable number.

121021311311121 is a deficient number, since it is larger than the sum of its proper divisors (52755291476079).

121021311311121 is a wasteful number, since it uses less digits than its factorization.

121021311311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43074776.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 121021311311121 its reverse (121113113120121), we get a palindrome (242134424431242).

The spelling of 121021311311121 in words is "one hundred twenty-one trillion, twenty-one billion, three hundred eleven million, three hundred eleven thousand, one hundred twenty-one".