121002112020121 has 4 divisors (see below), whose sum is σ = 123953383045044. Its totient is φ = 118050840995200.

The previous prime is 121002112020113. The next prime is 121002112020131. The reversal of 121002112020121 is 121020211200121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2258374778521 + 118743737241600 = 1502789^2 + 10896960^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002112020121 - 2³ = 121002112020113 is a prime.

It is a super-2 number, since 2×121002112020121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121002112020095 and 121002112020104.

It is not an unprimeable number, because it can be changed into a prime (121002112020131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475635512400 + ... + 1475635512481.

It is an arithmetic number, because the mean of its divisors is an integer number (30988345761261).

Almost surely, 2^{121002112020121} is an apocalyptic number.

It is an amenable number.

121002112020121 is a deficient number, since it is larger than the sum of its proper divisors (2951271024923).

121002112020121 is an equidigital number, since it uses as much as digits as its factorization.

121002112020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951271024922.

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

Adding to 121002112020121 its reverse (121020211200121), we get a palindrome (242022323220242).

The spelling of 121002112020121 in words is "one hundred twenty-one trillion, two billion, one hundred twelve million, twenty thousand, one hundred twenty-one".