101020020121121 has 4 divisors (see below), whose sum is σ = 102020218340244. Its totient is φ = 100019821902000.

The previous prime is 101020020121109. The next prime is 101020020121151. The reversal of 101020020121121 is 121121020020101.

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 77016771846400 + 24003248274721 = 8775920^2 + 4899311^2 .

It is a cyclic number.

It is not a de Polignac number, because 101020020121121 - 2⁶ = 101020020121057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101020020121096 and 101020020121105.

It is not an unprimeable number, because it can be changed into a prime (101020020121151) 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, 500099109410 + ... + 500099109611.

It is an arithmetic number, because the mean of its divisors is an integer number (25505054585061).

Almost surely, 2^{101020020121121} is an apocalyptic number.

It is an amenable number.

101020020121121 is a deficient number, since it is larger than the sum of its proper divisors (1000198219123).

101020020121121 is a wasteful number, since it uses less digits than its factorization.

101020020121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000198219122.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101020020121121 its reverse (121121020020101), we get a palindrome (222141040141222).

The spelling of 101020020121121 in words is "one hundred one trillion, twenty billion, twenty million, one hundred twenty-one thousand, one hundred twenty-one".