21140144122 has 4 divisors (see below), whose sum is σ = 31710216186. Its totient is φ = 10570072060.

The previous prime is 21140144107. The next prime is 21140144143. The reversal of 21140144122 is 22144104112.

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., 12436933441 + 8703210681 = 111521^2 + 93291^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21140144093 and 21140144102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5285036029 + ... + 5285036032.

Almost surely, 2^21140144122 is an apocalyptic number.

21140144122 is a deficient number, since it is larger than the sum of its proper divisors (10570072064).

21140144122 is a wasteful number, since it uses less digits than its factorization.

21140144122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10570072063.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21140144122 its reverse (22144104112), we get a palindrome (43284248234).

The spelling of 21140144122 in words is "twenty-one billion, one hundred forty million, one hundred forty-four thousand, one hundred twenty-two".