101212042 has 4 divisors (see below), whose sum is σ = 151818066. Its totient is φ = 50606020.

The previous prime is 101212037. The next prime is 101212051. The reversal of 101212042 is 240212101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240212101 = 137 ⋅1753373.

It can be written as a sum of positive squares in only one way, i.e., 101183481 + 28561 = 10059^2 + 169^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25303009 + ... + 25303012.

Almost surely, 2^101212042 is an apocalyptic number.

101212042 is a deficient number, since it is larger than the sum of its proper divisors (50606024).

101212042 is an equidigital number, since it uses as much as digits as its factorization.

101212042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50606023.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 101212042 is about 10060.4195737554. The cubic root of 101212042 is about 466.0266244988.

Adding to 101212042 its reverse (240212101), we get a palindrome (341424143).

The spelling of 101212042 in words is "one hundred one million, two hundred twelve thousand, forty-two".