201001200121221 has 64 divisors (see below), whose sum is σ = 284585725036800. Its totient is φ = 125972922507264.

The previous prime is 201001200121151. The next prime is 201001200121247. The reversal of 201001200121221 is 122121002100102.

It is not a de Polignac number, because 201001200121221 - 2²³ = 201001191732613 is a prime.

It is a super-2 number, since 2×201001200121221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201001200121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001200121321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2192543041 + ... + 2192634713.

It is an arithmetic number, because the mean of its divisors is an integer number (4446651953700).

Almost surely, 2^{201001200121221} is an apocalyptic number.

It is an amenable number.

201001200121221 is a deficient number, since it is larger than the sum of its proper divisors (83584524915579).

201001200121221 is a wasteful number, since it uses less digits than its factorization.

201001200121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93590.

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

Adding to 201001200121221 its reverse (122121002100102), we get a palindrome (323122202221323).

The spelling of 201001200121221 in words is "two hundred one trillion, one billion, two hundred million, one hundred twenty-one thousand, two hundred twenty-one".