101544321220 has 24 divisors (see below), whose sum is σ = 213699717504. Its totient is φ = 40530748896.

The previous prime is 101544321191. The next prime is 101544321271. The reversal of 101544321220 is 22123445101.

It is a super-2 number, since 2×101544321220² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5426652 + ... + 5445331.

It is an arithmetic number, because the mean of its divisors is an integer number (8904154896).

Almost surely, 2^101544321220 is an apocalyptic number.

101544321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101544321220 is an abundant number, since it is smaller than the sum of its proper divisors (112155396284).

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

101544321220 is a wasteful number, since it uses less digits than its factorization.

101544321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10872459 (or 10872457 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 101544321220 its reverse (22123445101), we get a palindrome (123667766321).

The spelling of 101544321220 in words is "one hundred one billion, five hundred forty-four million, three hundred twenty-one thousand, two hundred twenty".