201201230021 has 16 divisors (see below), whose sum is σ = 227438971200. Its totient is φ = 176308944000.

The previous prime is 201201229981. The next prime is 201201230023. The reversal of 201201230021 is 120032102102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201201230021 - 2²² = 201197035717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201201229978 and 201201230005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201230023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333011 + ... + 716448.

It is an arithmetic number, because the mean of its divisors is an integer number (14214935700).

Almost surely, 2^201201230021 is an apocalyptic number.

It is an amenable number.

201201230021 is a deficient number, since it is larger than the sum of its proper divisors (26237741179).

201201230021 is a wasteful number, since it uses less digits than its factorization.

201201230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050100.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 201201230021 its reverse (120032102102), we get a palindrome (321233332123).

The spelling of 201201230021 in words is "two hundred one billion, two hundred one million, two hundred thirty thousand, twenty-one".