10201221505 has 16 divisors (see below), whose sum is σ = 12905565120. Its totient is φ = 7719565248.

The previous prime is 10201221497. The next prime is 10201221509. The reversal of 10201221505 is 50512210201.

It is a cyclic number.

It is not a de Polignac number, because 10201221505 - 2³ = 10201221497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (10201221509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20187 + ... + 144256.

It is an arithmetic number, because the mean of its divisors is an integer number (806597820).

Almost surely, 2^10201221505 is an apocalyptic number.

It is an amenable number.

10201221505 is a deficient number, since it is larger than the sum of its proper divisors (2704343615).

10201221505 is a wasteful number, since it uses less digits than its factorization.

10201221505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165120.

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 10201221505 its reverse (50512210201), we get a palindrome (60713431706).

The spelling of 10201221505 in words is "ten billion, two hundred one million, two hundred twenty-one thousand, five hundred five".