21101230064 has 40 divisors (see below), whose sum is σ = 43101713040. Its totient is φ = 9979918848.

The previous prime is 21101230063. The next prime is 21101230069. The reversal of 21101230064 is 46003210112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101230063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145364 + ... + 251660.

It is an arithmetic number, because the mean of its divisors is an integer number (1077542826).

Almost surely, 2^21101230064 is an apocalyptic number.

It is an amenable number.

21101230064 is an abundant number, since it is smaller than the sum of its proper divisors (22000482976).

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

21101230064 is a wasteful number, since it uses less digits than its factorization.

21101230064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106977 (or 106971 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21101230064 its reverse (46003210112), we get a palindrome (67104440176).

The spelling of 21101230064 in words is "twenty-one billion, one hundred one million, two hundred thirty thousand, sixty-four".