100021221119978 has 16 divisors (see below), whose sum is σ = 151931546592000. Its totient is φ = 49377377071152.

The previous prime is 100021221119977. The next prime is 100021221120043. The reversal of 100021221119978 is 879911122120001.

It is not an unprimeable number, because it can be changed into a prime (100021221119977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46415828 + ... + 48522896.

It is an arithmetic number, because the mean of its divisors is an integer number (9495721662000).

Almost surely, 2^{100021221119978} is an apocalyptic number.

100021221119978 is a deficient number, since it is larger than the sum of its proper divisors (51910325472022).

100021221119978 is a wasteful number, since it uses less digits than its factorization.

100021221119978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407589.

The product of its (nonzero) digits is 36288, while the sum is 44.

Adding to 100021221119978 its reverse (879911122120001), we get a palindrome (979932343239979).

The spelling of 100021221119978 in words is "one hundred trillion, twenty-one billion, two hundred twenty-one million, one hundred nineteen thousand, nine hundred seventy-eight".