101215422142 has 4 divisors (see below), whose sum is σ = 151823133216. Its totient is φ = 50607711070.

The previous prime is 101215422109. The next prime is 101215422149. The reversal of 101215422142 is 241224512101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241224512101 = 281 ⋅858450221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101215422149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25303855534 + ... + 25303855537.

It is an arithmetic number, because the mean of its divisors is an integer number (37955783304).

Almost surely, 2^101215422142 is an apocalyptic number.

101215422142 is a deficient number, since it is larger than the sum of its proper divisors (50607711074).

101215422142 is an equidigital number, since it uses as much as digits as its factorization.

101215422142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50607711073.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 101215422142 its reverse (241224512101), we get a palindrome (342439934243).

The spelling of 101215422142 in words is "one hundred one billion, two hundred fifteen million, four hundred twenty-two thousand, one hundred forty-two".