21230120010 has 64 divisors (see below), whose sum is σ = 56124057600. Its totient is φ = 5096719680.

The previous prime is 21230119997. The next prime is 21230120017. The reversal of 21230120010 is 1002103212.

It is not an unprimeable number, because it can be changed into a prime (21230120017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278310 + ... + 346289.

It is an arithmetic number, because the mean of its divisors is an integer number (876938400).

Almost surely, 2^21230120010 is an apocalyptic number.

21230120010 is an abundant number, since it is smaller than the sum of its proper divisors (34893937590).

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

21230120010 is a wasteful number, since it uses less digits than its factorization.

21230120010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624723.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21230120010 its reverse (1002103212), we get a palindrome (22232223222).

The spelling of 21230120010 in words is "twenty-one billion, two hundred thirty million, one hundred twenty thousand, ten".