211111227490 has 32 divisors (see below), whose sum is σ = 388943311680. Its totient is φ = 82458204864.

The previous prime is 211111227461. The next prime is 211111227491. The reversal of 211111227490 is 94722111112.

It is not an unprimeable number, because it can be changed into a prime (211111227491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560012 + ... + 1689928.

It is an arithmetic number, because the mean of its divisors is an integer number (12154478490).

Almost surely, 2^211111227490 is an apocalyptic number.

211111227490 is a deficient number, since it is larger than the sum of its proper divisors (177832084190).

211111227490 is a wasteful number, since it uses less digits than its factorization.

211111227490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133746.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 211111227490 in words is "two hundred eleven billion, one hundred eleven million, two hundred twenty-seven thousand, four hundred ninety".