101012042 has 4 divisors (see below), whose sum is σ = 151518066. Its totient is φ = 50506020.

The previous prime is 101012033. The next prime is 101012053. The reversal of 101012042 is 240210101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 95863681 + 5148361 = 9791^2 + 2269^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25253009 + ... + 25253012.

Almost surely, 2^101012042 is an apocalyptic number.

101012042 is a deficient number, since it is larger than the sum of its proper divisors (50506024).

101012042 is an equidigital number, since it uses as much as digits as its factorization.

101012042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50506023.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 101012042 is about 10050.4747151565. The cubic root of 101012042 is about 465.7194581995.

Adding to 101012042 its reverse (240210101), we get a palindrome (341222143).

The spelling of 101012042 in words is "one hundred one million, twelve thousand, forty-two".