2021010211021 has 4 divisors (see below), whose sum is σ = 2021088138912. Its totient is φ = 2020932283132.

The previous prime is 2021010210991. The next prime is 2021010211027. The reversal of 2021010211021 is 1201120101202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2021010211021 - 2³¹ = 2018862727373 is a prime.

It is a super-2 number, since 2×2021010211021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021010210992 and 2021010211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021010211027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38925031 + ... + 38976916.

It is an arithmetic number, because the mean of its divisors is an integer number (505272034728).

Almost surely, 2^{2021010211021} is an apocalyptic number.

It is an amenable number.

2021010211021 is a deficient number, since it is larger than the sum of its proper divisors (77927891).

2021010211021 is an equidigital number, since it uses as much as digits as its factorization.

2021010211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77927890.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021010211021 its reverse (1201120101202), we get a palindrome (3222130312223).

The spelling of 2021010211021 in words is "two trillion, twenty-one billion, ten million, two hundred eleven thousand, twenty-one".