20225125104021 has 24 divisors (see below), whose sum is σ = 31025996149824. Its totient is φ = 12651935345280.

The previous prime is 20225125103983. The next prime is 20225125104061. The reversal of 20225125104021 is 12040152152202.

20225125104021 is a `hidden beast` number, since 2 + 0 + 2 + 2 + 5 + 1 + 251 + 0 + 402 + 1 = 666.

It is not a de Polignac number, because 20225125104021 - 2¹⁸ = 20225124841877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225125104061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199632681 + ... + 199733966.

It is an arithmetic number, because the mean of its divisors is an integer number (1292749839576).

Almost surely, 2^{20225125104021} is an apocalyptic number.

It is an amenable number.

20225125104021 is a deficient number, since it is larger than the sum of its proper divisors (10800871045803).

20225125104021 is a wasteful number, since it uses less digits than its factorization.

20225125104021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399367001 (or 399366998 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 20225125104021 its reverse (12040152152202), we get a palindrome (32265277256223).

The spelling of 20225125104021 in words is "twenty trillion, two hundred twenty-five billion, one hundred twenty-five million, one hundred four thousand, twenty-one".