21000011101142 has 16 divisors (see below), whose sum is σ = 31521258481680. Its totient is φ = 10492927328352.

The previous prime is 21000011101141. The next prime is 21000011101189. The reversal of 21000011101142 is 24110111000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000011101141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17083808 + ... + 18271740.

It is an arithmetic number, because the mean of its divisors is an integer number (1970078655105).

Almost surely, 2^{21000011101142} is an apocalyptic number.

21000011101142 is a deficient number, since it is larger than the sum of its proper divisors (10521247380538).

21000011101142 is a wasteful number, since it uses less digits than its factorization.

21000011101142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193887.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21000011101142 its reverse (24110111000012), we get a palindrome (45110122101154).

The spelling of 21000011101142 in words is "twenty-one trillion, eleven million, one hundred one thousand, one hundred forty-two".