201211010002121 has 4 divisors (see below), whose sum is σ = 229955440002432. Its totient is φ = 172466580001812.

The previous prime is 201211010002091. The next prime is 201211010002147. The reversal of 201211010002121 is 121200010112102.

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 a de Polignac number, because none of the positive numbers 2^k-201211010002121 is a prime.

It is a super-5 number, since 5×201211010002121⁵ (a number of 73 digits) contains 55555 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201211010002096 and 201211010002105.

It is not an unprimeable number, because it can be changed into a prime (201211010002151) 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, 14372215000145 + ... + 14372215000158.

It is an arithmetic number, because the mean of its divisors is an integer number (57488860000608).

Almost surely, 2^{201211010002121} is an apocalyptic number.

It is an amenable number.

201211010002121 is a deficient number, since it is larger than the sum of its proper divisors (28744430000311).

201211010002121 is an equidigital number, since it uses as much as digits as its factorization.

201211010002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28744430000310.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201211010002121 its reverse (121200010112102), we get a palindrome (322411020114223).

The spelling of 201211010002121 in words is "two hundred one trillion, two hundred eleven billion, ten million, two thousand, one hundred twenty-one".