101431220420 has 48 divisors (see below), whose sum is σ = 213593079168. Its totient is φ = 40460705280.

The previous prime is 101431220411. The next prime is 101431220437. The reversal of 101431220420 is 24022134101.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 101431220392 and 101431220401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18805244 + ... + 18810636.

It is an arithmetic number, because the mean of its divisors is an integer number (4449855816).

Almost surely, 2^101431220420 is an apocalyptic number.

101431220420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101431220420 is an abundant number, since it is smaller than the sum of its proper divisors (112161858748).

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

101431220420 is a wasteful number, since it uses less digits than its factorization.

101431220420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7820 (or 7818 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 101431220420 its reverse (24022134101), we get a palindrome (125453354521).

The spelling of 101431220420 in words is "one hundred one billion, four hundred thirty-one million, two hundred twenty thousand, four hundred twenty".