21140124122 has 32 divisors (see below), whose sum is σ = 35304898944. Its totient is φ = 9430344000.

The previous prime is 21140124107. The next prime is 21140124127. The reversal of 21140124122 is 22142104112.

It is a junction number, because it is equal to n+sod(n) for n = 21140124094 and 21140124103.

It is not an unprimeable number, because it can be changed into a prime (21140124127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72497 + ... + 218027.

It is an arithmetic number, because the mean of its divisors is an integer number (1103278092).

Almost surely, 2^21140124122 is an apocalyptic number.

21140124122 is a deficient number, since it is larger than the sum of its proper divisors (14164774822).

21140124122 is a wasteful number, since it uses less digits than its factorization.

21140124122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145734.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21140124122 its reverse (22142104112), we get a palindrome (43282228234).

The spelling of 21140124122 in words is "twenty-one billion, one hundred forty million, one hundred twenty-four thousand, one hundred twenty-two".