20122141 has 4 divisors (see below), whose sum is σ = 21670012. Its totient is φ = 18574272.

The previous prime is 20122133. The next prime is 20122147. The reversal of 20122141 is 14122102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14122102 = 2 ⋅7061051.

It can be written as a sum of positive squares in 2 ways, for example, as 6022116 + 14100025 = 2454^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122141 - 2³ = 20122133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1547857 = 20122141 / (2 + 0 + 1 + 2 + 2 + 1 + 4 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773916 + ... + 773941.

It is an arithmetic number, because the mean of its divisors is an integer number (5417503).

Almost surely, 2^20122141 is an apocalyptic number.

It is an amenable number.

20122141 is a deficient number, since it is larger than the sum of its proper divisors (1547871).

20122141 is a wasteful number, since it uses less digits than its factorization.

20122141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547870.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 20122141 is about 4485.7709482318. The cubic root of 20122141 is about 271.9932100742.

Adding to 20122141 its reverse (14122102), we get a palindrome (34244243).

The spelling of 20122141 in words is "twenty million, one hundred twenty-two thousand, one hundred forty-one".