100003210121220 has 192 divisors, whose sum is σ = 320976630374400. Its totient is φ = 22788903744000.

The previous prime is 100003210121207. The next prime is 100003210121249. The reversal of 100003210121220 is 22121012300001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 100003210121220.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 367632421 + ... + 367904339.

It is an arithmetic number, because the mean of its divisors is an integer number (1671753283200).

Almost surely, 2^{100003210121220} is an apocalyptic number.

100003210121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100003210121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160488315187200).

100003210121220 is an abundant number, since it is smaller than the sum of its proper divisors (220973420253180).

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

100003210121220 is a wasteful number, since it uses less digits than its factorization.

100003210121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274578 (or 274576 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 100003210121220 its reverse (22121012300001), we get a palindrome (122124222421221).

The spelling of 100003210121220 in words is "one hundred trillion, three billion, two hundred ten million, one hundred twenty-one thousand, two hundred twenty".