1212143555413 has 16 divisors (see below), whose sum is σ = 1411500940416. Its totient is φ = 1019336235840.

The previous prime is 1212143555407. The next prime is 1212143555423. The reversal of 1212143555413 is 3145553412121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212143555413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212143555423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12588670 + ... + 12684592.

It is an arithmetic number, because the mean of its divisors is an integer number (88218808776).

Almost surely, 2^{1212143555413} is an apocalyptic number.

It is an amenable number.

1212143555413 is a deficient number, since it is larger than the sum of its proper divisors (199357385003).

1212143555413 is an equidigital number, since it uses as much as digits as its factorization.

1212143555413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130044.

The product of its digits is 72000, while the sum is 37.

Adding to 1212143555413 its reverse (3145553412121), we get a palindrome (4357696967534).

The spelling of 1212143555413 in words is "one trillion, two hundred twelve billion, one hundred forty-three million, five hundred fifty-five thousand, four hundred thirteen".