2121188 has 6 divisors (see below), whose sum is σ = 3712086. Its totient is φ = 1060592.

The previous prime is 2121187. The next prime is 2121191. The reversal of 2121188 is 8811212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1763584 + 357604 = 1328^2 + 598^2 .

It is not an unprimeable number, because it can be changed into a prime (2121181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265145 + ... + 265152.

It is an arithmetic number, because the mean of its divisors is an integer number (618681).

2^2121188 is an apocalyptic number.

It is an amenable number.

2121188 is a deficient number, since it is larger than the sum of its proper divisors (1590898).

2121188 is a wasteful number, since it uses less digits than its factorization.

2121188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530301 (or 530299 counting only the distinct ones).

The product of its digits is 256, while the sum is 23.

The square root of 2121188 is about 1456.4298815940. The cubic root of 2121188 is about 128.4871572402.

The spelling of 2121188 in words is "two million, one hundred twenty-one thousand, one hundred eighty-eight".