22121220201 has 16 divisors (see below), whose sum is σ = 29544275328. Its totient is φ = 14722848000.

The previous prime is 22121220169. The next prime is 22121220203. The reversal of 22121220201 is 10202212122.

It is not a de Polignac number, because 22121220201 - 2⁵ = 22121220169 is a prime.

It is a super-2 number, since 2×22121220201² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22121220203) 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, 6761196 + ... + 6764466.

It is an arithmetic number, because the mean of its divisors is an integer number (1846517208).

Almost surely, 2^22121220201 is an apocalyptic number.

It is an amenable number.

22121220201 is a deficient number, since it is larger than the sum of its proper divisors (7423055127).

22121220201 is a wasteful number, since it uses less digits than its factorization.

22121220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6352.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22121220201 its reverse (10202212122), we get a palindrome (32323432323).

The spelling of 22121220201 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty thousand, two hundred one".