10021201021221 has 32 divisors (see below), whose sum is σ = 15898281557760. Its totient is φ = 5551780844544.

The previous prime is 10021201021211. The next prime is 10021201021291. The reversal of 10021201021221 is 12212010212001.

It is not a de Polignac number, because 10021201021221 - 2¹⁵ = 10021200988453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10021201021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021201021211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328570266 + ... + 328600763.

It is an arithmetic number, because the mean of its divisors is an integer number (496821298680).

Almost surely, 2^{10021201021221} is an apocalyptic number.

It is an amenable number.

10021201021221 is a deficient number, since it is larger than the sum of its proper divisors (5877080536539).

10021201021221 is a wasteful number, since it uses less digits than its factorization.

10021201021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657171085.

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

Adding to 10021201021221 its reverse (12212010212001), we get a palindrome (22233211233222).

The spelling of 10021201021221 in words is "ten trillion, twenty-one billion, two hundred one million, twenty-one thousand, two hundred twenty-one".