121021121101211 has 16 divisors (see below), whose sum is σ = 122497881327360. Its totient is φ = 119556257628000.

The previous prime is 121021121101171. The next prime is 121021121101253. The reversal of 121021121101211 is 112101121120121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021121101211 is a prime.

It is a super-2 number, since 2×121021121101211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121021121101211.

It is not an unprimeable number, because it can be changed into a prime (121021121101271) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 11114156 + ... + 19119798.

It is an arithmetic number, because the mean of its divisors is an integer number (7656117582960).

Almost surely, 2^{121021121101211} is an apocalyptic number.

121021121101211 is a deficient number, since it is larger than the sum of its proper divisors (1476760226149).

121021121101211 is a wasteful number, since it uses less digits than its factorization.

121021121101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8006386.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121021121101211 its reverse (112101121120121), we get a palindrome (233122242221332).

The spelling of 121021121101211 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred twenty-one million, one hundred one thousand, two hundred eleven".