211200992442 has 48 divisors (see below), whose sum is σ = 507663430560. Its totient is φ = 62915546400.

The previous prime is 211200992417. The next prime is 211200992461. The reversal of 211200992442 is 244299002112.

211200992442 is a `hidden beast` number, since 2 + 1 + 1 + 200 + 9 + 9 + 2 + 442 = 666.

211200992442 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211200992442² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211200992397 and 211200992406.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 9027909 + ... + 9051272.

It is an arithmetic number, because the mean of its divisors is an integer number (10576321470).

Almost surely, 2^211200992442 is an apocalyptic number.

211200992442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211200992442 is an abundant number, since it is smaller than the sum of its proper divisors (296462438118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211200992442 is a wasteful number, since it uses less digits than its factorization.

211200992442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18079259 (or 18079256 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

Adding to 211200992442 its reverse (244299002112), we get a palindrome (455499994554).

The spelling of 211200992442 in words is "two hundred eleven billion, two hundred million, nine hundred ninety-two thousand, four hundred forty-two".