121011021111121 has 2 divisors, whose sum is σ = 121011021111122. Its totient is φ = 121011021111120.

The previous prime is 121011021111089. The next prime is 121011021111229. The reversal of 121011021111121 is 121111120110121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104834336010496 + 16176685100625 = 10238864^2 + 4022025^2 .

It is an emirp because it is prime and its reverse (121111120110121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121011021111121 - 2⁵ = 121011021111089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121011021111095 and 121011021111104.

It is not a weakly prime, because it can be changed into another prime (121011021114121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505510555560 + 60505510555561.

It is an arithmetic number, because the mean of its divisors is an integer number (60505510555561).

Almost surely, 2^{121011021111121} is an apocalyptic number.

It is an amenable number.

121011021111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121011021111121 is an equidigital number, since it uses as much as digits as its factorization.

121011021111121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 121011021111121 its reverse (121111120110121), we get a palindrome (242122141221242).

The spelling of 121011021111121 in words is "one hundred twenty-one trillion, eleven billion, twenty-one million, one hundred eleven thousand, one hundred twenty-one".