21010221021201 has 64 divisors (see below), whose sum is σ = 30883333447680. Its totient is φ = 12646011755520.

The previous prime is 21010221021187. The next prime is 21010221021331. The reversal of 21010221021201 is 10212012201012.

It is not a de Polignac number, because 21010221021201 - 2²² = 21010216826897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010221021401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 935981160 + ... + 936003606.

It is an arithmetic number, because the mean of its divisors is an integer number (482552085120).

Almost surely, 2^{21010221021201} is an apocalyptic number.

It is an amenable number.

21010221021201 is a deficient number, since it is larger than the sum of its proper divisors (9873112426479).

21010221021201 is a wasteful number, since it uses less digits than its factorization.

21010221021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25086.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21010221021201 its reverse (10212012201012), we get a palindrome (31222233222213).

The spelling of 21010221021201 in words is "twenty-one trillion, ten billion, two hundred twenty-one million, twenty-one thousand, two hundred one".