20101111011142 has 8 divisors (see below), whose sum is σ = 34459047447696. Its totient is φ = 8614761861912.

The previous prime is 20101111011077. The next prime is 20101111011143. The reversal of 20101111011142 is 24111011110102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101111011143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717896821813 + ... + 717896821840.

It is an arithmetic number, because the mean of its divisors is an integer number (4307380930962).

Almost surely, 2^{20101111011142} is an apocalyptic number.

20101111011142 is a deficient number, since it is larger than the sum of its proper divisors (14357936436554).

20101111011142 is a wasteful number, since it uses less digits than its factorization.

20101111011142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435793643662.

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

Adding to 20101111011142 its reverse (24111011110102), we get a palindrome (44212122121244).

The spelling of 20101111011142 in words is "twenty trillion, one hundred one billion, one hundred eleven million, eleven thousand, one hundred forty-two".