2021401321021 has 8 divisors (see below), whose sum is σ = 2069586632960. Its totient is φ = 1973269462752.

The previous prime is 2021401321019. The next prime is 2021401321061. The reversal of 2021401321021 is 1201231041202.

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 2021401321021 - 2¹ = 2021401321019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021401321021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021401321061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13286880 + ... + 13438153.

It is an arithmetic number, because the mean of its divisors is an integer number (258698329120).

Almost surely, 2^{2021401321021} is an apocalyptic number.

It is an amenable number.

2021401321021 is a deficient number, since it is larger than the sum of its proper divisors (48185311939).

2021401321021 is a wasteful number, since it uses less digits than its factorization.

2021401321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26726835.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2021401321021 its reverse (1201231041202), we get a palindrome (3222632362223).

The spelling of 2021401321021 in words is "two trillion, twenty-one billion, four hundred one million, three hundred twenty-one thousand, twenty-one".