21001044012132 has 48 divisors (see below), whose sum is σ = 49233000458880. Its totient is φ = 6967478499072.

The previous prime is 21001044012061. The next prime is 21001044012197. The reversal of 21001044012132 is 23121044010012.

It is a junction number, because it is equal to n+sod(n) for n = 21001044012099 and 21001044012108.

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, 1805257 + ... + 6727632.

It is an arithmetic number, because the mean of its divisors is an integer number (1025687509560).

Almost surely, 2^{21001044012132} is an apocalyptic number.

It is an amenable number.

21001044012132 is an abundant number, since it is smaller than the sum of its proper divisors (28231956446748).

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

21001044012132 is a wasteful number, since it uses less digits than its factorization.

21001044012132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8533860 (or 8533858 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21001044012132 its reverse (23121044010012), we get a palindrome (44122088022144).

The spelling of 21001044012132 in words is "twenty-one trillion, one billion, forty-four million, twelve thousand, one hundred thirty-two".