121211020121020 has 12 divisors (see below), whose sum is σ = 254543142254184. Its totient is φ = 48484408048400.

The previous prime is 121211020121017. The next prime is 121211020121071. The reversal of 121211020121020 is 20121020112121.

121211020121020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121211020121020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121211020120985 and 121211020121003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030275503006 + ... + 3030275503045.

It is an arithmetic number, because the mean of its divisors is an integer number (21211928521182).

Almost surely, 2^{121211020121020} is an apocalyptic number.

121211020121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211020121020 is an abundant number, since it is smaller than the sum of its proper divisors (133332122133164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121211020121020 is a wasteful number, since it uses less digits than its factorization.

121211020121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060551006060 (or 6060551006058 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121211020121020 its reverse (20121020112121), we get a palindrome (141332040233141).

The spelling of 121211020121020 in words is "one hundred twenty-one trillion, two hundred eleven billion, twenty million, one hundred twenty-one thousand, twenty".