100021200030 has 40 divisors (see below), whose sum is σ = 268945895592. Its totient is φ = 26672319792.

The previous prime is 100021199987. The next prime is 100021200031. The reversal of 100021200030 is 30002120001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100021199985 and 100021200021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021200031) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 61740672 + ... + 61742291.

Almost surely, 2^100021200030 is an apocalyptic number.

100021200030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100021200030 is an abundant number, since it is smaller than the sum of its proper divisors (168924695562).

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

100021200030 is a wasteful number, since it uses less digits than its factorization.

100021200030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123482982 (or 123482973 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 100021200030 its reverse (30002120001), we get a palindrome (130023320031).

The spelling of 100021200030 in words is "one hundred billion, twenty-one million, two hundred thousand, thirty".