221210102122001 has 16 divisors (see below), whose sum is σ = 241780070315520. Its totient is φ = 201479981955840.

The previous prime is 221210102121977. The next prime is 221210102122003. The reversal of 221210102122001 is 100221201012122.

It is not a de Polignac number, because 221210102122001 - 2¹⁴ = 221210102105617 is a prime.

It is a super-2 number, since 2×221210102122001² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221210102122003) 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, 62784170 + ... + 66213836.

It is an arithmetic number, because the mean of its divisors is an integer number (15111254394720).

Almost surely, 2^{221210102122001} is an apocalyptic number.

It is an amenable number.

221210102122001 is a deficient number, since it is larger than the sum of its proper divisors (20569968193519).

221210102122001 is a wasteful number, since it uses less digits than its factorization.

221210102122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552104.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221210102122001 its reverse (100221201012122), we get a palindrome (321431303134123).

The spelling of 221210102122001 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred two million, one hundred twenty-two thousand, one".