21012044332142 has 64 divisors (see below), whose sum is σ = 33078820552704. Its totient is φ = 9998909464320.

The previous prime is 21012044332009. The next prime is 21012044332159. The reversal of 21012044332142 is 24123344021012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415832483 + ... + 415883009.

It is an arithmetic number, because the mean of its divisors is an integer number (516856571136).

Almost surely, 2^{21012044332142} is an apocalyptic number.

21012044332142 is a deficient number, since it is larger than the sum of its proper divisors (12066776220562).

21012044332142 is a wasteful number, since it uses less digits than its factorization.

21012044332142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51153.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21012044332142 its reverse (24123344021012), we get a palindrome (45135388353154).

It can be divided in two parts, 2101204 and 4332142, that added together give a palindrome (6433346).

The spelling of 21012044332142 in words is "twenty-one trillion, twelve billion, forty-four million, three hundred thirty-two thousand, one hundred forty-two".