103121131203220 has 48 divisors (see below), whose sum is σ = 233214534313488. Its totient is φ = 38075146859520.

The previous prime is 103121131203179. The next prime is 103121131203229. The reversal of 103121131203220 is 22302131121301.

It can be written as a sum of positive squares in 8 ways, for example, as 7609719479184 + 95511411724036 = 2758572^2 + 9772994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 103121131203191 and 103121131203200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121131203229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27630832 + ... + 31140088.

It is an arithmetic number, because the mean of its divisors is an integer number (4858636131531).

Almost surely, 2^{103121131203220} is an apocalyptic number.

103121131203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103121131203220 is an abundant number, since it is smaller than the sum of its proper divisors (130093403110268).

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

103121131203220 is a wasteful number, since it uses less digits than its factorization.

103121131203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622300 (or 3622298 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 103121131203220 its reverse (22302131121301), we get a palindrome (125423262324521).

The spelling of 103121131203220 in words is "one hundred three trillion, one hundred twenty-one billion, one hundred thirty-one million, two hundred three thousand, two hundred twenty".