2021011011121 has 8 divisors (see below), whose sum is σ = 2044744628040. Its totient is φ = 1997300186112.

The previous prime is 2021011010987. The next prime is 2021011011127. The reversal of 2021011011121 is 1211101101202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41193167521 + 1979817843600 = 202961^2 + 1407060^2 .

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 2021011011121 - 2²⁷ = 2020876793393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021011011127) 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, 5519560 + ... + 5874313.

It is an arithmetic number, because the mean of its divisors is an integer number (255593078505).

Almost surely, 2^{2021011011121} is an apocalyptic number.

It is an amenable number.

2021011011121 is a deficient number, since it is larger than the sum of its proper divisors (23733616919).

2021011011121 is a wasteful number, since it uses less digits than its factorization.

2021011011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11395955.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2021011011121 its reverse (1211101101202), we get a palindrome (3232112112323).

The spelling of 2021011011121 in words is "two trillion, twenty-one billion, eleven million, eleven thousand, one hundred twenty-one".