201011012120021 has 4 divisors (see below), whose sum is σ = 204417978427200. Its totient is φ = 197604045812844.

The previous prime is 201011012119999. The next prime is 201011012120033. The reversal of 201011012120021 is 120021210110102.

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 201011012120021 - 2²⁶ = 201010945011157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201011012119978 and 201011012120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011012120921) 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, 1703483153501 + ... + 1703483153618.

It is an arithmetic number, because the mean of its divisors is an integer number (51104494606800).

Almost surely, 2^{201011012120021} is an apocalyptic number.

It is an amenable number.

201011012120021 is a deficient number, since it is larger than the sum of its proper divisors (3406966307179).

201011012120021 is an equidigital number, since it uses as much as digits as its factorization.

201011012120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406966307178.

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

Adding to 201011012120021 its reverse (120021210110102), we get a palindrome (321032222230123).

The spelling of 201011012120021 in words is "two hundred one trillion, eleven billion, twelve million, one hundred twenty thousand, twenty-one".