221001022121 has 8 divisors (see below), whose sum is σ = 241096065600. Its totient is φ = 200906652240.

The previous prime is 221001022103. The next prime is 221001022133. The reversal of 221001022121 is 121220100122.

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 221001022121 - 2¹⁰ = 221001021097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221001022096 and 221001022105.

It is not an unprimeable number, because it can be changed into a prime (221001072121) 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, 722615 + ... + 981923.

It is an arithmetic number, because the mean of its divisors is an integer number (30137008200).

Almost surely, 2^221001022121 is an apocalyptic number.

It is an amenable number.

221001022121 is a deficient number, since it is larger than the sum of its proper divisors (20095043479).

221001022121 is a wasteful number, since it uses less digits than its factorization.

221001022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336799.

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

Adding to 221001022121 its reverse (121220100122), we get a palindrome (342221122243).

The spelling of 221001022121 in words is "two hundred twenty-one billion, one million, twenty-two thousand, one hundred twenty-one".