421136102500 has 45 divisors (see below), whose sum is σ = 921011390607. Its totient is φ = 168441462000.

The previous prime is 421136102459. The next prime is 421136102503. The reversal of 421136102500 is 5201631124.

It is a happy number.

The square root of 421136102500 is 648950.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 33017070436 + 388119032064 = 181706^2 + 622992^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421136102503) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 32441011 + ... + 32453989.

Almost surely, 2^421136102500 is an apocalyptic number.

421136102500 is the 648950-th square number.

It is an amenable number.

421136102500 is an abundant number, since it is smaller than the sum of its proper divisors (499875288107).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421136102500 is an frugal number, since it uses more digits than its factorization.

421136102500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25982 (or 12986 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Multiplying 421136102500 by its sum of digits (25), we get a square (10528402562500 = 3244750²).

421136102500 divided by its sum of digits (25) gives a square (16845444100 = 129790²).

Adding to 421136102500 its reverse (5201631124), we get a palindrome (426337733624).

The spelling of 421136102500 in words is "four hundred twenty-one billion, one hundred thirty-six million, one hundred two thousand, five hundred".