2021101012021 has 48 divisors (see below), whose sum is σ = 2538118800000. Its totient is φ = 1595208650112.

The previous prime is 2021101011967. The next prime is 2021101012037. The reversal of 2021101012021 is 1202101011202.

It is not a de Polignac number, because 2021101012021 - 2¹⁹ = 2021100487733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 2021101011992 and 2021101012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021101012321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 673923480 + ... + 673926478.

It is an arithmetic number, because the mean of its divisors is an integer number (52877475000).

Almost surely, 2^{2021101012021} is an apocalyptic number.

It is an amenable number.

2021101012021 is a deficient number, since it is larger than the sum of its proper divisors (517017787979).

2021101012021 is a wasteful number, since it uses less digits than its factorization.

2021101012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258 (or 5251 counting only the distinct ones).

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

Adding to 2021101012021 its reverse (1202101011202), we get a palindrome (3223202023223).

The spelling of 2021101012021 in words is "two trillion, twenty-one billion, one hundred one million, twelve thousand, twenty-one".