2020102001021 has 8 divisors (see below), whose sum is σ = 2178888378744. Its totient is φ = 1861800468480.

The previous prime is 2020102001017. The next prime is 2020102001059. The reversal of 2020102001021 is 1201002010202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 192168256900 + 1827933744121 = 438370^2 + 1352011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2020102001021 - 2² = 2020102001017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020102000993 and 2020102001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020102009021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121202636 + ... + 121219301.

It is an arithmetic number, because the mean of its divisors is an integer number (272361047343).

Almost surely, 2^{2020102001021} is an apocalyptic number.

It is an amenable number.

2020102001021 is a deficient number, since it is larger than the sum of its proper divisors (158786377723).

2020102001021 is a wasteful number, since it uses less digits than its factorization.

2020102001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242422591.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2020102001021 its reverse (1201002010202), we get a palindrome (3221104011223).

The spelling of 2020102001021 in words is "two trillion, twenty billion, one hundred two million, one thousand, twenty-one".