1213453220434 has 64 divisors (see below), whose sum is σ = 2379167223552. Its totient is φ = 450443980800.

The previous prime is 1213453220431. The next prime is 1213453220443. The reversal of 1213453220434 is 4340223543121.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 1213453220434.

It is not an unprimeable number, because it can be changed into a prime (1213453220431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 431674 + ... + 1616554.

It is an arithmetic number, because the mean of its divisors is an integer number (37174487868).

Almost surely, 2^{1213453220434} is an apocalyptic number.

1213453220434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1213453220434 is a deficient number, since it is larger than the sum of its proper divisors (1165714003118).

1213453220434 is a wasteful number, since it uses less digits than its factorization.

1213453220434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185251.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 1213453220434 its reverse (4340223543121), we get a palindrome (5553676763555).

The spelling of 1213453220434 in words is "one trillion, two hundred thirteen billion, four hundred fifty-three million, two hundred twenty thousand, four hundred thirty-four".