201121022001 has 16 divisors (see below), whose sum is σ = 283983796800. Its totient is φ = 126172144128.

The previous prime is 201121021991. The next prime is 201121022077. The reversal of 201121022001 is 100220121102.

It is not a de Polignac number, because 201121022001 - 2⁹ = 201121021489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201121022701) 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, 29116 + ... + 634893.

It is an arithmetic number, because the mean of its divisors is an integer number (17748987300).

Almost surely, 2^201121022001 is an apocalyptic number.

It is an amenable number.

201121022001 is a deficient number, since it is larger than the sum of its proper divisors (82862774799).

201121022001 is a wasteful number, since it uses less digits than its factorization.

201121022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669968.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201121022001 its reverse (100220121102), we get a palindrome (301341143103).

The spelling of 201121022001 in words is "two hundred one billion, one hundred twenty-one million, twenty-two thousand, one".