201001222121001 has 32 divisors (see below), whose sum is σ = 284613730352640. Its totient is φ = 125820182686464.

The previous prime is 201001222120999. The next prime is 201001222121041. The reversal of 201001222121001 is 100121222100102.

It is not a de Polignac number, because 201001222121001 - 2¹ = 201001222120999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201001222121041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183324646 + ... + 184417808.

It is an arithmetic number, because the mean of its divisors is an integer number (8894179073520).

Almost surely, 2^{201001222121001} is an apocalyptic number.

It is an amenable number.

201001222121001 is a deficient number, since it is larger than the sum of its proper divisors (83612508231639).

201001222121001 is a wasteful number, since it uses less digits than its factorization.

201001222121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121845.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201001222121001 its reverse (100121222100102), we get a palindrome (301122444221103).

The spelling of 201001222121001 in words is "two hundred one trillion, one billion, two hundred twenty-two million, one hundred twenty-one thousand, one".