1231002051225 has 24 divisors (see below), whose sum is σ = 2035413466272. Its totient is φ = 656483865600.

The previous prime is 1231002051211. The next prime is 1231002051247. The reversal of 1231002051225 is 5221502001321.

It is not a de Polignac number, because 1231002051225 - 2⁶ = 1231002051161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231002051195 and 1231002051204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358614 + ... + 1609536.

It is an arithmetic number, because the mean of its divisors is an integer number (84808894428).

Almost surely, 2^{1231002051225} is an apocalyptic number.

1231002051225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231002051225 is a deficient number, since it is larger than the sum of its proper divisors (804411415047).

1231002051225 is a wasteful number, since it uses less digits than its factorization.

1231002051225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264057 (or 1264052 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 1231002051225 its reverse (5221502001321), we get a palindrome (6452504052546).

The spelling of 1231002051225 in words is "one trillion, two hundred thirty-one billion, two million, fifty-one thousand, two hundred twenty-five".