100021221111 has 8 divisors (see below), whose sum is σ = 152413289344. Its totient is φ = 57154983480.

The previous prime is 100021221077. The next prime is 100021221119. The reversal of 100021221111 is 111122120001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100021221111 - 2⁷ = 100021220983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021221119) 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, 2381457625 + ... + 2381457666.

It is an arithmetic number, because the mean of its divisors is an integer number (19051661168).

Almost surely, 2^100021221111 is an apocalyptic number.

100021221111 is a deficient number, since it is larger than the sum of its proper divisors (52392068233).

100021221111 is an equidigital number, since it uses as much as digits as its factorization.

100021221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762915301.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100021221111 its reverse (111122120001), we get a palindrome (211143341112).

The spelling of 100021221111 in words is "one hundred billion, twenty-one million, two hundred twenty-one thousand, one hundred eleven".