2021010111021 has 24 divisors (see below), whose sum is σ = 3090700347840. Its totient is φ = 1171600059520.

The previous prime is 2021010111013. The next prime is 2021010111049. The reversal of 2021010111021 is 1201110101202.

It is not a de Polignac number, because 2021010111021 - 2³ = 2021010111013 is a prime.

It is a super-2 number, since 2×2021010111021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021010110988 and 2021010111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021010111061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121024716 + ... + 121041413.

It is an arithmetic number, because the mean of its divisors is an integer number (128779181160).

Almost surely, 2^{2021010111021} is an apocalyptic number.

It is an amenable number.

2021010111021 is a deficient number, since it is larger than the sum of its proper divisors (1069690236819).

2021010111021 is a wasteful number, since it uses less digits than its factorization.

2021010111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242066177 (or 242066166 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2021010111021 its reverse (1201110101202), we get a palindrome (3222120212223).

The spelling of 2021010111021 in words is "two trillion, twenty-one billion, ten million, one hundred eleven thousand, twenty-one".