202121222001 has 8 divisors (see below), whose sum is σ = 269518559520. Its totient is φ = 134735682912.

The previous prime is 202121221997. The next prime is 202121222021. The reversal of 202121222001 is 100222121202.

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

It is not a de Polignac number, because 202121222001 - 2² = 202121221997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (202121222021) 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, 2909556 + ... + 2978213.

It is an arithmetic number, because the mean of its divisors is an integer number (33689819940).

Almost surely, 2^202121222001 is an apocalyptic number.

It is an amenable number.

202121222001 is a deficient number, since it is larger than the sum of its proper divisors (67397337519).

202121222001 is a wasteful number, since it uses less digits than its factorization.

202121222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5899215.

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

Adding to 202121222001 its reverse (100222121202), we get a palindrome (302343343203).

The spelling of 202121222001 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty-two thousand, one".