201001233212121 has 4 divisors (see below), whose sum is σ = 268001644282832. Its totient is φ = 134000822141412.

The previous prime is 201001233212119. The next prime is 201001233212161. The reversal of 201001233212121 is 121212332100102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 201001233212121 - 2¹ = 201001233212119 is a prime.

It is a super-3 number, since 3×201001233212121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201001233212161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33500205535351 + ... + 33500205535356.

It is an arithmetic number, because the mean of its divisors is an integer number (67000411070708).

Almost surely, 2^{201001233212121} is an apocalyptic number.

It is an amenable number.

201001233212121 is a deficient number, since it is larger than the sum of its proper divisors (67000411070711).

201001233212121 is an equidigital number, since it uses as much as digits as its factorization.

201001233212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67000411070710.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 201001233212121 its reverse (121212332100102), we get a palindrome (322213565312223).

The spelling of 201001233212121 in words is "two hundred one trillion, one billion, two hundred thirty-three million, two hundred twelve thousand, one hundred twenty-one".