21142043043 has 16 divisors (see below), whose sum is σ = 31812480000. Its totient is φ = 12371518880.

The previous prime is 21142043011. The next prime is 21142043057. The reversal of 21142043043 is 34034024112.

It is a cyclic number.

It is not a de Polignac number, because 21142043043 - 2⁵ = 21142043011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21142043093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11045043 + ... + 11046956.

It is an arithmetic number, because the mean of its divisors is an integer number (1988280000).

Almost surely, 2^21142043043 is an apocalyptic number.

21142043043 is a deficient number, since it is larger than the sum of its proper divisors (10670436957).

21142043043 is a wasteful number, since it uses less digits than its factorization.

21142043043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22092042.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21142043043 its reverse (34034024112), we get a palindrome (55176067155).

The spelling of 21142043043 in words is "twenty-one billion, one hundred forty-two million, forty-three thousand, forty-three".