1321421153534 has 16 divisors (see below), whose sum is σ = 1989366013872. Its totient is φ = 658299690048.

The previous prime is 1321421153527. The next prime is 1321421153537. The reversal of 1321421153534 is 4353511241231.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321421153494 and 1321421153503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321421153537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4925402 + ... + 5186754.

It is an arithmetic number, because the mean of its divisors is an integer number (124335375867).

Almost surely, 2^{1321421153534} is an apocalyptic number.

1321421153534 is a deficient number, since it is larger than the sum of its proper divisors (667944860338).

1321421153534 is a wasteful number, since it uses less digits than its factorization.

1321421153534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270571.

The product of its digits is 43200, while the sum is 35.

Adding to 1321421153534 its reverse (4353511241231), we get a palindrome (5674932394765).

The spelling of 1321421153534 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, one hundred fifty-three thousand, five hundred thirty-four".