1212011520425 has 12 divisors (see below), whose sum is σ = 1504044206736. Its totient is φ = 968867331600.

The previous prime is 1212011520359. The next prime is 1212011520427. The reversal of 1212011520425 is 5240251102121.

It is a happy number.

It is not a de Polignac number, because 1212011520425 - 2¹² = 1212011516329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212011520394 and 1212011520403.

It is not an unprimeable number, because it can be changed into a prime (1212011520427) 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, 18513791 + ... + 18579140.

It is an arithmetic number, because the mean of its divisors is an integer number (125337017228).

Almost surely, 2^{1212011520425} is an apocalyptic number.

It is an amenable number.

1212011520425 is a deficient number, since it is larger than the sum of its proper divisors (292032686311).

1212011520425 is a wasteful number, since it uses less digits than its factorization.

1212011520425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37094248 (or 37094243 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 1212011520425 its reverse (5240251102121), we get a palindrome (6452262622546).

The spelling of 1212011520425 in words is "one trillion, two hundred twelve billion, eleven million, five hundred twenty thousand, four hundred twenty-five".