21150204522603 has 12 divisors (see below), whose sum is σ = 30536389962360. Its totient is φ = 13015510475136.

The previous prime is 21150204522547. The next prime is 21150204522611. The reversal of 21150204522603 is 30622540205112.

It is a happy number.

It is not a de Polignac number, because 21150204522603 - 2¹⁴ = 21150204506219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21150204512603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20858189358 + ... + 20858190371.

It is an arithmetic number, because the mean of its divisors is an integer number (2544699163530).

Almost surely, 2^{21150204522603} is an apocalyptic number.

21150204522603 is a deficient number, since it is larger than the sum of its proper divisors (9386185439757).

21150204522603 is a wasteful number, since it uses less digits than its factorization.

21150204522603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41716379758 (or 41716379745 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 21150204522603 its reverse (30622540205112), we get a palindrome (51772744727715).

The spelling of 21150204522603 in words is "twenty-one trillion, one hundred fifty billion, two hundred four million, five hundred twenty-two thousand, six hundred three".