1021234312225 has 12 divisors (see below), whose sum is σ = 1266451739644. Its totient is φ = 816909261120.

The previous prime is 1021234312171. The next prime is 1021234312229. The reversal of 1021234312225 is 5222134321201.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 12945205729 + 1008289106496 = 113777^2 + 1004136^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1021234312225 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021234312193 and 1021234312202.

It is not an unprimeable number, because it can be changed into a prime (1021234312229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1687554 + ... + 2211403.

Almost surely, 2^{1021234312225} is an apocalyptic number.

It is an amenable number.

1021234312225 is a deficient number, since it is larger than the sum of its proper divisors (245217427419).

1021234312225 is a wasteful number, since it uses less digits than its factorization.

1021234312225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909444 (or 3909439 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 1021234312225 its reverse (5222134321201), we get a palindrome (6243368633426).

The spelling of 1021234312225 in words is "one trillion, twenty-one billion, two hundred thirty-four million, three hundred twelve thousand, two hundred twenty-five".