1425020101521 has 16 divisors (see below), whose sum is σ = 1903844622336. Its totient is φ = 948104845776.

The previous prime is 1425020101499. The next prime is 1425020101559. The reversal of 1425020101521 is 1251010205241.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1425020101521 is a prime.

It is a super-2 number, since 2×1425020101521² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1425020101491 and 1425020101500.

It is not an unprimeable number, because it can be changed into a prime (1425020101321) 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, 18637656 + ... + 18713958.

It is an arithmetic number, because the mean of its divisors is an integer number (118990288896).

Almost surely, 2^{1425020101521} is an apocalyptic number.

It is an amenable number.

1425020101521 is a deficient number, since it is larger than the sum of its proper divisors (478824520815).

1425020101521 is a wasteful number, since it uses less digits than its factorization.

1425020101521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88732.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 1425020101521 its reverse (1251010205241), we get a palindrome (2676030306762).

The spelling of 1425020101521 in words is "one trillion, four hundred twenty-five billion, twenty million, one hundred one thousand, five hundred twenty-one".