2020121011001 has 4 divisors (see below), whose sum is σ = 2021122560372. Its totient is φ = 2019119461632.

The previous prime is 2020121010989. The next prime is 2020121011021. The reversal of 2020121011001 is 1001101210202.

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 625560773776 + 1394560237225 = 790924^2 + 1180915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020121011001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020121011021) 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, 500771660 + ... + 500775693.

It is an arithmetic number, because the mean of its divisors is an integer number (505280640093).

Almost surely, 2^{2020121011001} is an apocalyptic number.

It is an amenable number.

2020121011001 is a deficient number, since it is larger than the sum of its proper divisors (1001549371).

2020121011001 is a wasteful number, since it uses less digits than its factorization.

2020121011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001549370.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2020121011001 its reverse (1001101210202), we get a palindrome (3021222221203).

The spelling of 2020121011001 in words is "two trillion, twenty billion, one hundred twenty-one million, eleven thousand, one".