201230211021 has 32 divisors (see below), whose sum is σ = 309103776000. Its totient is φ = 114065518080.

The previous prime is 201230211001. The next prime is 201230211043. The reversal of 201230211021 is 120112032102.

It is not a de Polignac number, because 201230211021 - 2⁵ = 201230210989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201230211001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2338915 + ... + 2423423.

It is an arithmetic number, because the mean of its divisors is an integer number (9659493000).

Almost surely, 2^201230211021 is an apocalyptic number.

201230211021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201230211021 is a deficient number, since it is larger than the sum of its proper divisors (107873564979).

201230211021 is a wasteful number, since it uses less digits than its factorization.

201230211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85429.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 201230211021 its reverse (120112032102), we get a palindrome (321342243123).

The spelling of 201230211021 in words is "two hundred one billion, two hundred thirty million, two hundred eleven thousand, twenty-one".