201021201010 has 144 divisors (see below), whose sum is σ = 456658383744. Its totient is φ = 63485087232.

The previous prime is 201021200987. The next prime is 201021201019. The reversal of 201021201010 is 10102120102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (201021201019) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6640569 + ... + 6670771.

It is an arithmetic number, because the mean of its divisors is an integer number (3171238776).

Almost surely, 2^201021201010 is an apocalyptic number.

201021201010 is an abundant number, since it is smaller than the sum of its proper divisors (255637182734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201021201010 is a wasteful number, since it uses less digits than its factorization.

201021201010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30305 (or 30281 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201021201010 its reverse (10102120102), we get a palindrome (211123321112).

The spelling of 201021201010 in words is "two hundred one billion, twenty-one million, two hundred one thousand, ten".