1213012155245 has 24 divisors (see below), whose sum is σ = 1627091292960. Its totient is φ = 867238248800.

The previous prime is 1213012155233. The next prime is 1213012155269. The reversal of 1213012155245 is 5425512103121.

It is not a de Polignac number, because 1213012155245 - 2⁶ = 1213012155181 is a prime.

It is a congruent 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, 16955651 + ... + 17027040.

It is an arithmetic number, because the mean of its divisors is an integer number (67795470540).

Almost surely, 2^{1213012155245} is an apocalyptic number.

It is an amenable number.

1213012155245 is a deficient number, since it is larger than the sum of its proper divisors (414079137715).

1213012155245 is a wasteful number, since it uses less digits than its factorization.

1213012155245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33982777 (or 33982766 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 1213012155245 its reverse (5425512103121), we get a palindrome (6638524258366).

The spelling of 1213012155245 in words is "one trillion, two hundred thirteen billion, twelve million, one hundred fifty-five thousand, two hundred forty-five".