21220200201121 has 8 divisors (see below), whose sum is σ = 21223999981440. Its totient is φ = 21216400710768.

The previous prime is 21220200201107. The next prime is 21220200201131. The reversal of 21220200201121 is 12110200202212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21220200201121 - 2⁹ = 21220200200609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21220200201095 and 21220200201104.

It is not an unprimeable number, because it can be changed into a prime (21220200201131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187688010 + ... + 187801036.

It is an arithmetic number, because the mean of its divisors is an integer number (2652999997680).

Almost surely, 2^{21220200201121} is an apocalyptic number.

It is an amenable number.

21220200201121 is a deficient number, since it is larger than the sum of its proper divisors (3799780319).

21220200201121 is a wasteful number, since it uses less digits than its factorization.

21220200201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144983.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21220200201121 its reverse (12110200202212), we get a palindrome (33330400403333).

The spelling of 21220200201121 in words is "twenty-one trillion, two hundred twenty billion, two hundred million, two hundred one thousand, one hundred twenty-one".