21201031130 has 32 divisors (see below), whose sum is σ = 39867545088. Its totient is φ = 8107963200.

The previous prime is 21201031129. The next prime is 21201031139. The reversal of 21201031130 is 3113010212.

It is not an unprimeable number, because it can be changed into a prime (21201031139) 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, 386261 + ... + 437720.

It is an arithmetic number, because the mean of its divisors is an integer number (1245860784).

Almost surely, 2^21201031130 is an apocalyptic number.

21201031130 is a deficient number, since it is larger than the sum of its proper divisors (18666513958).

21201031130 is a wasteful number, since it uses less digits than its factorization.

21201031130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824102.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21201031130 its reverse (3113010212), we get a palindrome (24314041342).

The spelling of 21201031130 in words is "twenty-one billion, two hundred one million, thirty-one thousand, one hundred thirty".