121020211211011 has 16 divisors (see below), whose sum is σ = 138382367307264. Its totient is φ = 103676451096384.

The previous prime is 121020211210993. The next prime is 121020211211017. The reversal of 121020211211011 is 110112112020121.

It is a cyclic number.

It is not a de Polignac number, because 121020211211011 - 2²⁵ = 121020177656579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020211211017) 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, 202132551 + ... + 202730383.

It is an arithmetic number, because the mean of its divisors is an integer number (8648897956704).

Almost surely, 2^{121020211211011} is an apocalyptic number.

121020211211011 is a deficient number, since it is larger than the sum of its proper divisors (17362156096253).

121020211211011 is a wasteful number, since it uses less digits than its factorization.

121020211211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613170.

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

Adding to 121020211211011 its reverse (110112112020121), we get a palindrome (231132323231132).

The spelling of 121020211211011 in words is "one hundred twenty-one trillion, twenty billion, two hundred eleven million, two hundred eleven thousand, eleven".