101220042 has 32 divisors (see below), whose sum is σ = 252393984. Its totient is φ = 26290800.

The previous prime is 101220037. The next prime is 101220043. The reversal of 101220042 is 240022101.

It is not an unprimeable number, because it can be changed into a prime (101220043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109084 + ... + 110007.

It is an arithmetic number, because the mean of its divisors is an integer number (7887312).

Almost surely, 2^101220042 is an apocalyptic number.

101220042 is an abundant number, since it is smaller than the sum of its proper divisors (151173942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101220042 is a wasteful number, since it uses less digits than its factorization.

101220042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219114.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 101220042 is about 10060.8171636304. The cubic root of 101220042 is about 466.0389027307.

Adding to 101220042 its reverse (240022101), we get a palindrome (341242143).

The spelling of 101220042 in words is "one hundred one million, two hundred twenty thousand, forty-two".