211120120242 has 24 divisors (see below), whose sum is σ = 458140566780. Its totient is φ = 70263582720.

The previous prime is 211120120231. The next prime is 211120120303. The reversal of 211120120242 is 242021021112.

It can be written as a sum of positive squares in 2 ways, for example, as 153443774961 + 57676345281 = 391719^2 + 240159^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9137367 + ... + 9160442.

Almost surely, 2^211120120242 is an apocalyptic number.

211120120242 is an abundant number, since it is smaller than the sum of its proper divisors (247020446538).

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

211120120242 is a wasteful number, since it uses less digits than its factorization.

211120120242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18298458 (or 18298455 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211120120242 its reverse (242021021112), we get a palindrome (453141141354).

The spelling of 211120120242 in words is "two hundred eleven billion, one hundred twenty million, one hundred twenty thousand, two hundred forty-two".