21135453112 has 64 divisors (see below), whose sum is σ = 43202548800. Its totient is φ = 9662822400.

The previous prime is 21135453109. The next prime is 21135453127.

21135453112 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×21135453112³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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, 519328 + ... + 558544.

It is an arithmetic number, because the mean of its divisors is an integer number (675039825).

Almost surely, 2^21135453112 is an apocalyptic number.

It is an amenable number.

21135453112 is an abundant number, since it is smaller than the sum of its proper divisors (22067095688).

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

21135453112 is a wasteful number, since it uses less digits than its factorization.

21135453112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39376 (or 39372 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The spelling of 21135453112 in words is "twenty-one billion, one hundred thirty-five million, four hundred fifty-three thousand, one hundred twelve".