101221230440 has 32 divisors (see below), whose sum is σ = 248452112160. Its totient is φ = 36807720000.

The previous prime is 101221230437. The next prime is 101221230457. The reversal of 101221230440 is 44032122101.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115023686 + ... + 115024565.

It is an arithmetic number, because the mean of its divisors is an integer number (7764128505).

Almost surely, 2^101221230440 is an apocalyptic number.

101221230440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221230440 is an abundant number, since it is smaller than the sum of its proper divisors (147230881720).

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

101221230440 is a wasteful number, since it uses less digits than its factorization.

101221230440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230048273 (or 230048269 counting only the distinct ones).

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

Adding to 101221230440 its reverse (44032122101), we get a palindrome (145253352541).

The spelling of 101221230440 in words is "one hundred one billion, two hundred twenty-one million, two hundred thirty thousand, four hundred forty".