1213351066425 has 24 divisors (see below), whose sum is σ = 2006142195904. Its totient is φ = 647098493760.

The previous prime is 1213351066387. The next prime is 1213351066481. The reversal of 1213351066425 is 5246601533121.

It is a happy number.

It is not a de Polignac number, because 1213351066425 - 2¹⁹ = 1213350542137 is a prime.

It is a Duffinian number.

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, 2069319 + ... + 2590131.

Almost surely, 2^{1213351066425} is an apocalyptic number.

1213351066425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213351066425 is a deficient number, since it is larger than the sum of its proper divisors (792791129479).

1213351066425 is a wasteful number, since it uses less digits than its factorization.

1213351066425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551889 (or 551884 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

Adding to 1213351066425 its reverse (5246601533121), we get a palindrome (6459952599546).

The spelling of 1213351066425 in words is "one trillion, two hundred thirteen billion, three hundred fifty-one million, sixty-six thousand, four hundred twenty-five".