21141123042 has 32 divisors (see below), whose sum is σ = 46393881408. Its totient is φ = 6382224576.

The previous prime is 21141123037. The next prime is 21141123071. The reversal of 21141123042 is 24032114112.

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, 2552848 + ... + 2561115.

It is an arithmetic number, because the mean of its divisors is an integer number (1449808794).

Almost surely, 2^21141123042 is an apocalyptic number.

21141123042 is an abundant number, since it is smaller than the sum of its proper divisors (25252758366).

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

21141123042 is a wasteful number, since it uses less digits than its factorization.

21141123042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114034.

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

Adding to 21141123042 its reverse (24032114112), we get a palindrome (45173237154).

The spelling of 21141123042 in words is "twenty-one billion, one hundred forty-one million, one hundred twenty-three thousand, forty-two".