102144045421 has 16 divisors (see below), whose sum is σ = 114554030976. Its totient is φ = 90270880000.

The previous prime is 102144045343. The next prime is 102144045433. The reversal of 102144045421 is 124540441201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102144045421 - 2²⁹ = 101607174509 is a prime.

It is a super-2 number, since 2×102144045421² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102144045421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102144045491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276265 + ... + 529726.

It is an arithmetic number, because the mean of its divisors is an integer number (7159626936).

Almost surely, 2^102144045421 is an apocalyptic number.

102144045421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102144045421 is a deficient number, since it is larger than the sum of its proper divisors (12409985555).

102144045421 is a wasteful number, since it uses less digits than its factorization.

102144045421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806324.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 102144045421 its reverse (124540441201), we get a palindrome (226684486622).

The spelling of 102144045421 in words is "one hundred two billion, one hundred forty-four million, forty-five thousand, four hundred twenty-one".