2021011121021 has 8 divisors (see below), whose sum is σ = 2032267036800. Its totient is φ = 2009766206448.

The previous prime is 2021011120991. The next prime is 2021011121083. The reversal of 2021011121021 is 1201211101202.

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 2021011121021 - 2¹⁰ = 2021011119997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021011120987 and 2021011121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021011121221) 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, 2381726 + ... + 3116831.

It is an arithmetic number, because the mean of its divisors is an integer number (254033379600).

Almost surely, 2^{2021011121021} is an apocalyptic number.

It is an amenable number.

2021011121021 is a deficient number, since it is larger than the sum of its proper divisors (11255915779).

2021011121021 is a wasteful number, since it uses less digits than its factorization.

2021011121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500603.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2021011121021 its reverse (1201211101202), we get a palindrome (3222222222223).

The spelling of 2021011121021 in words is "two trillion, twenty-one billion, eleven million, one hundred twenty-one thousand, twenty-one".