100021012211 has 4 divisors (see below), whose sum is σ = 100544682624. Its totient is φ = 99497341800.

The previous prime is 100021012207. The next prime is 100021012253. The reversal of 100021012211 is 112210120001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100021012211 - 2² = 100021012207 is a prime.

It is a super-2 number, since 2×100021012211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100021012192 and 100021012201.

It is not an unprimeable number, because it can be changed into a prime (100021012261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261834920 + ... + 261835301.

It is an arithmetic number, because the mean of its divisors is an integer number (25136170656).

Almost surely, 2^100021012211 is an apocalyptic number.

100021012211 is a deficient number, since it is larger than the sum of its proper divisors (523670413).

100021012211 is an equidigital number, since it uses as much as digits as its factorization.

100021012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523670412.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100021012211 its reverse (112210120001), we get a palindrome (212231132212).

The spelling of 100021012211 in words is "one hundred billion, twenty-one million, twelve thousand, two hundred eleven".