221000122101 has 16 divisors (see below), whose sum is σ = 330142690368. Its totient is φ = 130319481600.

The previous prime is 221000122097. The next prime is 221000122117. The reversal of 221000122101 is 101221000122.

It is not a de Polignac number, because 221000122101 - 2² = 221000122097 is a prime.

It is a super-4 number, since 4×221000122101⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000126101) 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, 90498420 + ... + 90500861.

It is an arithmetic number, because the mean of its divisors is an integer number (20633918148).

Almost surely, 2^221000122101 is an apocalyptic number.

It is an amenable number.

221000122101 is a deficient number, since it is larger than the sum of its proper divisors (109142568267).

221000122101 is a wasteful number, since it uses less digits than its factorization.

221000122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180999332.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221000122101 its reverse (101221000122), we get a palindrome (322221122223).

It can be divided in two parts, 221000122 and 101, that multiplied together give a palindrome (22321012322).

The spelling of 221000122101 in words is "two hundred twenty-one billion, one hundred twenty-two thousand, one hundred one".