2201021221021 has 24 divisors (see below), whose sum is σ = 2812307532480. Its totient is φ = 1709586914112.

The previous prime is 2201021220953. The next prime is 2201021221037. The reversal of 2201021221021 is 1201221201022.

It is a happy number.

It is not a de Polignac number, because 2201021221021 - 2²³ = 2201012832413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201021220986 and 2201021221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201021201021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51373096 + ... + 51415921.

It is an arithmetic number, because the mean of its divisors is an integer number (117179480520).

Almost surely, 2^{2201021221021} is an apocalyptic number.

It is an amenable number.

2201021221021 is a deficient number, since it is larger than the sum of its proper divisors (611286311459).

2201021221021 is a wasteful number, since it uses less digits than its factorization.

2201021221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102789073 (or 102789066 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2201021221021 its reverse (1201221201022), we get a palindrome (3402242422043).

The spelling of 2201021221021 in words is "two trillion, two hundred one billion, twenty-one million, two hundred twenty-one thousand, twenty-one".