211131300030021 has 36 divisors (see below), whose sum is σ = 354759060895200. Its totient is φ = 120646108186128.

The previous prime is 211131300029987. The next prime is 211131300030073. The reversal of 211131300030021 is 120030003131112.

211131300030021 is a `hidden beast` number, since 2 + 1 + 11 + 31 + 300 + 0 + 300 + 21 = 666.

It is not a de Polignac number, because 211131300030021 - 2⁷ = 211131300029893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211131300029976 and 211131300030003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211131300030821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 293540410 + ... + 294258788.

It is an arithmetic number, because the mean of its divisors is an integer number (9854418358200).

Almost surely, 2^{211131300030021} is an apocalyptic number.

211131300030021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211131300030021 is a deficient number, since it is larger than the sum of its proper divisors (143627760865179).

211131300030021 is a wasteful number, since it uses less digits than its factorization.

211131300030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384838 (or 1384828 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 211131300030021 its reverse (120030003131112), we get a palindrome (331161303161133).

The spelling of 211131300030021 in words is "two hundred eleven trillion, one hundred thirty-one billion, three hundred million, thirty thousand, twenty-one".