21145254112 has 12 divisors (see below), whose sum is σ = 41629719096. Its totient is φ = 10572627040.

The previous prime is 21145254059. The next prime is 21145254157.

21145254112 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21145254112² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330394564 + ... + 330394627.

It is an arithmetic number, because the mean of its divisors is an integer number (3469143258).

Almost surely, 2^21145254112 is an apocalyptic number.

It is an amenable number.

21145254112 is a deficient number, since it is larger than the sum of its proper divisors (20484464984).

21145254112 is an equidigital number, since it uses as much as digits as its factorization.

21145254112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660789201 (or 660789193 counting only the distinct ones).

The product of its digits is 3200, while the sum is 28.

The spelling of 21145254112 in words is "twenty-one billion, one hundred forty-five million, two hundred fifty-four thousand, one hundred twelve".