103121220440 has 64 divisors (see below), whose sum is σ = 270810777600. Its totient is φ = 34603590528.

The previous prime is 103121220439. The next prime is 103121220443. The reversal of 103121220440 is 44022121301.

It is a super-2 number, since 2×103121220440² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121220443) 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, 3904820 + ... + 3931139.

It is an arithmetic number, because the mean of its divisors is an integer number (4231418400).

Almost surely, 2^103121220440 is an apocalyptic number.

103121220440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103121220440 is an abundant number, since it is smaller than the sum of its proper divisors (167689557160).

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

103121220440 is a wasteful number, since it uses less digits than its factorization.

103121220440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7836024 (or 7836020 counting only the distinct ones).

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

Adding to 103121220440 its reverse (44022121301), we get a palindrome (147143341741).

The spelling of 103121220440 in words is "one hundred three billion, one hundred twenty-one million, two hundred twenty thousand, four hundred forty".