21040201420221 has 16 divisors (see below), whose sum is σ = 28645459907904. Its totient is φ = 13732030176384.

The previous prime is 21040201420211. The next prime is 21040201420283. The reversal of 21040201420221 is 12202410204012.

It is not a de Polignac number, because 21040201420221 - 2⁹ = 21040201419709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21040201420211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144706671 + ... + 144851996.

It is an arithmetic number, because the mean of its divisors is an integer number (1790341244244).

Almost surely, 2^{21040201420221} is an apocalyptic number.

It is an amenable number.

21040201420221 is a deficient number, since it is larger than the sum of its proper divisors (7605258487683).

21040201420221 is a wasteful number, since it uses less digits than its factorization.

21040201420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289559180.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21040201420221 its reverse (12202410204012), we get a palindrome (33242611624233).

The spelling of 21040201420221 in words is "twenty-one trillion, forty billion, two hundred one million, four hundred twenty thousand, two hundred twenty-one".