100021121211 has 24 divisors (see below), whose sum is σ = 150329777472. Its totient is φ = 58663395600.

The previous prime is 100021121201. The next prime is 100021121227. The reversal of 100021121211 is 112121120001.

It is not a de Polignac number, because 100021121211 - 2¹⁵ = 100021088443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100021121201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1545261 + ... + 1608686.

It is an arithmetic number, because the mean of its divisors is an integer number (6263740728).

Almost surely, 2^100021121211 is an apocalyptic number.

100021121211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100021121211 is a deficient number, since it is larger than the sum of its proper divisors (50308656261).

100021121211 is a wasteful number, since it uses less digits than its factorization.

100021121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154023 (or 3153992 counting only the distinct ones).

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

Adding to 100021121211 its reverse (112121120001), we get a palindrome (212142241212).

The spelling of 100021121211 in words is "one hundred billion, twenty-one million, one hundred twenty-one thousand, two hundred eleven".