100021221010 has 16 divisors (see below), whose sum is σ = 189513892800. Its totient is φ = 37902778416.

The previous prime is 100021220983. The next prime is 100021221017. The reversal of 100021221010 is 10122120001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (100021221017) 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, 263213550 + ... + 263213929.

It is an arithmetic number, because the mean of its divisors is an integer number (11844618300).

Almost surely, 2^100021221010 is an apocalyptic number.

100021221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100021221010 is a deficient number, since it is larger than the sum of its proper divisors (89492671790).

100021221010 is a wasteful number, since it uses less digits than its factorization.

100021221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526427505.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100021221010 its reverse (10122120001), we get a palindrome (110143341011).

The spelling of 100021221010 in words is "one hundred billion, twenty-one million, two hundred twenty-one thousand, ten".