1213520401045 has 8 divisors (see below), whose sum is σ = 1456797136896. Its totient is φ = 970434550416.

The previous prime is 1213520401033. The next prime is 1213520401057. The reversal of 1213520401045 is 5401040253121.

It is an interprime number because it is at equal distance from previous prime (1213520401033) and next prime (1213520401057).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213520401045 - 2¹⁹ = 1213519876757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47707317 + ... + 47732746.

It is an arithmetic number, because the mean of its divisors is an integer number (182099642112).

Almost surely, 2^{1213520401045} is an apocalyptic number.

It is an amenable number.

1213520401045 is a deficient number, since it is larger than the sum of its proper divisors (243276735851).

1213520401045 is an equidigital number, since it uses as much as digits as its factorization.

1213520401045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95442611.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1213520401045 its reverse (5401040253121), we get a palindrome (6614560654166).

The spelling of 1213520401045 in words is "one trillion, two hundred thirteen billion, five hundred twenty million, four hundred one thousand, forty-five".