2121154132 has 6 divisors (see below), whose sum is σ = 3712019738. Its totient is φ = 1060577064.

The previous prime is 2121154111. The next prime is 2121154151. The reversal of 2121154132 is 2314511212.

It can be written as a sum of positive squares in only one way, i.e., 1965503556 + 155650576 = 44334^2 + 12476^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 265144263 + ... + 265144270.

Almost surely, 2^2121154132 is an apocalyptic number.

It is an amenable number.

2121154132 is a deficient number, since it is larger than the sum of its proper divisors (1590865606).

2121154132 is a wasteful number, since it uses less digits than its factorization.

2121154132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530288537 (or 530288535 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 2121154132 is about 46055.9891002245. The cubic root of 2121154132 is about 1284.8647340546.

Adding to 2121154132 its reverse (2314511212), we get a palindrome (4435665344).

The spelling of 2121154132 in words is "two billion, one hundred twenty-one million, one hundred fifty-four thousand, one hundred thirty-two".