121011020011021 has 16 divisors (see below), whose sum is σ = 138359964637440. Its totient is φ = 103677491617920.

The previous prime is 121011020011001. The next prime is 121011020011109. The reversal of 121011020011021 is 120110020110121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121011020011021 - 2⁵ = 121011020010989 is a prime.

It is a super-2 number, since 2×121011020011021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121011020010992 and 121011020011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011020011001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 976297911 + ... + 976421851.

It is an arithmetic number, because the mean of its divisors is an integer number (8647497789840).

Almost surely, 2^{121011020011021} is an apocalyptic number.

It is an amenable number.

121011020011021 is a deficient number, since it is larger than the sum of its proper divisors (17348944626419).

121011020011021 is a wasteful number, since it uses less digits than its factorization.

121011020011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185004.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121011020011021 its reverse (120110020110121), we get a palindrome (241121040121142).

The spelling of 121011020011021 in words is "one hundred twenty-one trillion, eleven billion, twenty million, eleven thousand, twenty-one".