1020132120121 has 4 divisors (see below), whose sum is σ = 1030232438244. Its totient is φ = 1010031802000.

The previous prime is 1020132120089. The next prime is 1020132120127. The reversal of 1020132120121 is 1210212310201.

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 887107794496 + 133024325625 = 941864^2 + 364725^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020132120121 - 2⁵ = 1020132120089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020132120095 and 1020132120104.

It is not an unprimeable number, because it can be changed into a prime (1020132120127) 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, 5050158910 + ... + 5050159111.

It is an arithmetic number, because the mean of its divisors is an integer number (257558109561).

Almost surely, 2^{1020132120121} is an apocalyptic number.

It is an amenable number.

1020132120121 is a deficient number, since it is larger than the sum of its proper divisors (10100318123).

1020132120121 is a wasteful number, since it uses less digits than its factorization.

1020132120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100318122.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1020132120121 its reverse (1210212310201), we get a palindrome (2230344430322).

The spelling of 1020132120121 in words is "one trillion, twenty billion, one hundred thirty-two million, one hundred twenty thousand, one hundred twenty-one".