221020110202001 has 16 divisors (see below), whose sum is σ = 241776680682240. Its totient is φ = 200374209617280.

The previous prime is 221020110201997. The next prime is 221020110202019. The reversal of 221020110202001 is 100202011020122.

It is a cyclic number.

It is not a de Polignac number, because 221020110202001 - 2² = 221020110201997 is a prime.

It is a super-2 number, since 2×221020110202001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221020110202201) 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, 145127555 + ... + 146642583.

It is an arithmetic number, because the mean of its divisors is an integer number (15111042542640).

Almost surely, 2^{221020110202001} is an apocalyptic number.

It is an amenable number.

221020110202001 is a deficient number, since it is larger than the sum of its proper divisors (20756570480239).

221020110202001 is a wasteful number, since it uses less digits than its factorization.

221020110202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551544.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221020110202001 its reverse (100202011020122), we get a palindrome (321222121222123).

The spelling of 221020110202001 in words is "two hundred twenty-one trillion, twenty billion, one hundred ten million, two hundred two thousand, one".