201001321012121 has 4 divisors (see below), whose sum is σ = 229715795442432. Its totient is φ = 172286846581812.

The previous prime is 201001321012097. The next prime is 201001321012153. The reversal of 201001321012121 is 121210123100102.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 201001321012121 - 2¹⁴ = 201001320995737 is a prime.

It is a super-3 number, since 3×201001321012121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201001321012121.

It is not an unprimeable number, because it can be changed into a prime (201001321012021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14357237215145 + ... + 14357237215158.

It is an arithmetic number, because the mean of its divisors is an integer number (57428948860608).

Almost surely, 2^{201001321012121} is an apocalyptic number.

It is an amenable number.

201001321012121 is a deficient number, since it is larger than the sum of its proper divisors (28714474430311).

201001321012121 is an equidigital number, since it uses as much as digits as its factorization.

201001321012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28714474430310.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 201001321012121 its reverse (121210123100102), we get a palindrome (322211444112223).

The spelling of 201001321012121 in words is "two hundred one trillion, one billion, three hundred twenty-one million, twelve thousand, one hundred twenty-one".