21400141123 has 16 divisors (see below), whose sum is σ = 23261644800. Its totient is φ = 19612635840.

The previous prime is 21400141121. The next prime is 21400141151. The reversal of 21400141123 is 32114100412.

It is a cyclic number.

It is not a de Polignac number, because 21400141123 - 2¹ = 21400141121 is a prime.

It is a super-2 number, since 2×21400141123² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21400141123.

It is not an unprimeable number, because it can be changed into a prime (21400141121) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 2252898 + ... + 2262376.

It is an arithmetic number, because the mean of its divisors is an integer number (1453852800).

Almost surely, 2^21400141123 is an apocalyptic number.

21400141123 is a deficient number, since it is larger than the sum of its proper divisors (1861503677).

21400141123 is a wasteful number, since it uses less digits than its factorization.

21400141123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13362.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21400141123 its reverse (32114100412), we get a palindrome (53514241535).

The spelling of 21400141123 in words is "twenty-one billion, four hundred million, one hundred forty-one thousand, one hundred twenty-three".