201121210212001 has 4 divisors (see below), whose sum is σ = 202131869560000. Its totient is φ = 200110550864004.

The previous prime is 201121210211993. The next prime is 201121210212089. The reversal of 201121210212001 is 100212012121102.

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 201121210212001 - 2³ = 201121210211993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201121210222001) 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, 505329673701 + ... + 505329674098.

It is an arithmetic number, because the mean of its divisors is an integer number (50532967390000).

Almost surely, 2^{201121210212001} is an apocalyptic number.

It is an amenable number.

201121210212001 is a deficient number, since it is larger than the sum of its proper divisors (1010659347999).

201121210212001 is a wasteful number, since it uses less digits than its factorization.

201121210212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010659347998.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201121210212001 its reverse (100212012121102), we get a palindrome (301333222333103).

The spelling of 201121210212001 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred ten million, two hundred twelve thousand, one".