2421210111021 has 48 divisors (see below), whose sum is σ = 3974238777600. Its totient is φ = 1409180357376.

The previous prime is 2421210111007. The next prime is 2421210111119. The reversal of 2421210111021 is 1201110121242.

2421210111021 is a `hidden beast` number, since 2 + 421 + 210 + 1 + 1 + 10 + 21 = 666.

It is not a de Polignac number, because 2421210111021 - 2¹⁷ = 2421209979949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2421210110985 and 2421210111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421210101021) 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, 4815241 + ... + 5294238.

It is an arithmetic number, because the mean of its divisors is an integer number (82796641200).

Almost surely, 2^{2421210111021} is an apocalyptic number.

It is an amenable number.

2421210111021 is a deficient number, since it is larger than the sum of its proper divisors (1553028666579).

2421210111021 is a wasteful number, since it uses less digits than its factorization.

2421210111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10109610 (or 10109607 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2421210111021 its reverse (1201110121242), we get a palindrome (3622320232263).

The spelling of 2421210111021 in words is "two trillion, four hundred twenty-one billion, two hundred ten million, one hundred eleven thousand, twenty-one".