2154140122 has 4 divisors (see below), whose sum is σ = 3231210186. Its totient is φ = 1077070060.

The previous prime is 2154140063. The next prime is 2154140147. The reversal of 2154140122 is 2210414512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2153980921 + 159201 = 46411^2 + 399^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2154140093 and 2154140102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538535029 + ... + 538535032.

Almost surely, 2^2154140122 is an apocalyptic number.

2154140122 is a deficient number, since it is larger than the sum of its proper divisors (1077070064).

2154140122 is a wasteful number, since it uses less digits than its factorization.

2154140122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077070063.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2154140122 is about 46412.7150897251. The cubic root of 2154140122 is about 1291.4907993667.

Adding to 2154140122 its reverse (2210414512), we get a palindrome (4364554634).

The spelling of 2154140122 in words is "two billion, one hundred fifty-four million, one hundred forty thousand, one hundred twenty-two".