10221111020201 has 4 divisors (see below), whose sum is σ = 10274070144852. Its totient is φ = 10168151895552.

The previous prime is 10221111020179. The next prime is 10221111020209. The reversal of 10221111020201 is 10202011112201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1187936505625 + 9033174514576 = 1089925^2 + 3005524^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221111020201 is a prime.

It is a super-2 number, since 2×10221111020201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10221111020209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26479562036 + ... + 26479562421.

It is an arithmetic number, because the mean of its divisors is an integer number (2568517536213).

Almost surely, 2^{10221111020201} is an apocalyptic number.

It is an amenable number.

10221111020201 is a deficient number, since it is larger than the sum of its proper divisors (52959124651).

10221111020201 is an equidigital number, since it uses as much as digits as its factorization.

10221111020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52959124650.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10221111020201 its reverse (10202011112201), we get a palindrome (20423122132402).

The spelling of 10221111020201 in words is "ten trillion, two hundred twenty-one billion, one hundred eleven million, twenty thousand, two hundred one".