21023030241021 has 8 divisors (see below), whose sum is σ = 28032449497024. Its totient is φ = 14014482239520.

The previous prime is 21023030241011. The next prime is 21023030241023. The reversal of 21023030241021 is 12014203032012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21023030241021 - 2¹⁰ = 21023030239997 is a prime.

It is a super-2 number, since 2×21023030241021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023030241023) 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, 217757320 + ... + 217853841.

It is an arithmetic number, because the mean of its divisors is an integer number (3504056187128).

Almost surely, 2^{21023030241021} is an apocalyptic number.

It is an amenable number.

21023030241021 is a deficient number, since it is larger than the sum of its proper divisors (7009419256003).

21023030241021 is a wasteful number, since it uses less digits than its factorization.

21023030241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435627251.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21023030241021 its reverse (12014203032012), we get a palindrome (33037233273033).

The spelling of 21023030241021 in words is "twenty-one trillion, twenty-three billion, thirty million, two hundred forty-one thousand, twenty-one".