201221202022001 has 16 divisors (see below), whose sum is σ = 231413876951040. Its totient is φ = 171391574798160.

The previous prime is 201221202021967. The next prime is 201221202022013. The reversal of 201221202022001 is 100220202122102.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201221202022001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201221202822001) 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, 54480905 + ... + 58056966.

It is an arithmetic number, because the mean of its divisors is an integer number (14463367309440).

Almost surely, 2^{201221202022001} is an apocalyptic number.

It is an amenable number.

201221202022001 is a deficient number, since it is larger than the sum of its proper divisors (30192674929039).

201221202022001 is a wasteful number, since it uses less digits than its factorization.

201221202022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112539484.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 201221202022001 its reverse (100220202122102), we get a palindrome (301441404144103).

The spelling of 201221202022001 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred two million, twenty-two thousand, one".