1321237519434 has 64 divisors (see below), whose sum is σ = 3396950158080. Its totient is φ = 377496425376.

The previous prime is 1321237519423. The next prime is 1321237519451. The reversal of 1321237519434 is 4349157321231.

1321237519434 is a `hidden beast` number, since 1 + 3 + 2 + 123 + 7 + 519 + 4 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1321237519434.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21545539 + ... + 21606774.

It is an arithmetic number, because the mean of its divisors is an integer number (53077346220).

Almost surely, 2^{1321237519434} is an apocalyptic number.

1321237519434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1321237519434 is an abundant number, since it is smaller than the sum of its proper divisors (2075712638646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321237519434 is an frugal number, since it uses more digits than its factorization.

1321237519434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43152343 (or 43152325 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 1321237519434 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-seven million, five hundred nineteen thousand, four hundred thirty-four".