20101142042 has 8 divisors (see below), whose sum is σ = 30172076532. Its totient is φ = 10043783200.

The previous prime is 20101142021. The next prime is 20101142101. The reversal of 20101142042 is 24024110102.

It can be written as a sum of positive squares in 2 ways, for example, as 18933484801 + 1167657241 = 137599^2 + 34171^2 .

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

It is a super-2 number, since 2×20101142042² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20101142042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3390209 + ... + 3396132.

Almost surely, 2^20101142042 is an apocalyptic number.

20101142042 is a deficient number, since it is larger than the sum of its proper divisors (10070934490).

20101142042 is a wasteful number, since it uses less digits than its factorization.

20101142042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6787824.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20101142042 its reverse (24024110102), we get a palindrome (44125252144).

The spelling of 20101142042 in words is "twenty billion, one hundred one million, one hundred forty-two thousand, forty-two".