1020121202101 has 4 divisors (see below), whose sum is σ = 1020152925900. Its totient is φ = 1020089478304.

The previous prime is 1020121202071. The next prime is 1020121202117. The reversal of 1020121202101 is 1012021210201.

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 308880292900 + 711240909201 = 555770^2 + 843351^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020121202101 - 2¹³ = 1020121193909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020121206101) 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, 15813616 + ... + 15877993.

It is an arithmetic number, because the mean of its divisors is an integer number (255038231475).

Almost surely, 2^{1020121202101} is an apocalyptic number.

It is an amenable number.

1020121202101 is a deficient number, since it is larger than the sum of its proper divisors (31723799).

1020121202101 is an equidigital number, since it uses as much as digits as its factorization.

1020121202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31723798.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1020121202101 its reverse (1012021210201), we get a palindrome (2032142412302).

The spelling of 1020121202101 in words is "one trillion, twenty billion, one hundred twenty-one million, two hundred two thousand, one hundred one".