21151053120 has 224 divisors, whose sum is σ = 68397120000. Its totient is φ = 5536548864.

The previous prime is 21151053109. The next prime is 21151053127. The reversal of 21151053120 is 2135015112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21151053127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32095351 + ... + 32096009.

Almost surely, 2^21151053120 is an apocalyptic number.

21151053120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21151053120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34198560000).

21151053120 is an abundant number, since it is smaller than the sum of its proper divisors (47246066880).

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

21151053120 is a wasteful number, since it uses less digits than its factorization.

21151053120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 21151053120 its reverse (2135015112), we get a palindrome (23286068232).

The spelling of 21151053120 in words is "twenty-one billion, one hundred fifty-one million, fifty-three thousand, one hundred twenty".