201021500006 has 32 divisors (see below), whose sum is σ = 322697989152. Its totient is φ = 93583319040.

The previous prime is 201021499997. The next prime is 201021500059. The reversal of 201021500006 is 600005120102.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8619221 + ... + 8642511.

It is an arithmetic number, because the mean of its divisors is an integer number (10084312161).

Almost surely, 2^201021500006 is an apocalyptic number.

201021500006 is a deficient number, since it is larger than the sum of its proper divisors (121676489146).

201021500006 is a wasteful number, since it uses less digits than its factorization.

201021500006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26024.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 201021500006 its reverse (600005120102), we get a palindrome (801026620108).

The spelling of 201021500006 in words is "two hundred one billion, twenty-one million, five hundred thousand, six".