21101054352 has 80 divisors (see below), whose sum is σ = 65577231360. Its totient is φ = 5711561856.

The previous prime is 21101054321. The next prime is 21101054369. The reversal of 21101054352 is 25345010112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1646268 + ... + 1659035.

It is an arithmetic number, because the mean of its divisors is an integer number (819715392).

Almost surely, 2^21101054352 is an apocalyptic number.

It is an amenable number.

21101054352 is an abundant number, since it is smaller than the sum of its proper divisors (44476177008).

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

21101054352 is a wasteful number, since it uses less digits than its factorization.

21101054352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305340 (or 3305334 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 21101054352 its reverse (25345010112), we get a palindrome (46446064464).

The spelling of 21101054352 in words is "twenty-one billion, one hundred one million, fifty-four thousand, three hundred fifty-two".