20121453121513 has 8 divisors (see below), whose sum is σ = 20493936316800. Its totient is φ = 19751914457808.

The previous prime is 20121453121507. The next prime is 20121453121547. The reversal of 20121453121513 is 31512135412102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121453121513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121453121573) 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, 736119103 + ... + 736146436.

It is an arithmetic number, because the mean of its divisors is an integer number (2561742039600).

Almost surely, 2^{20121453121513} is an apocalyptic number.

It is an amenable number.

20121453121513 is a deficient number, since it is larger than the sum of its proper divisors (372483195287).

20121453121513 is a wasteful number, since it uses less digits than its factorization.

20121453121513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472265791.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 20121453121513 its reverse (31512135412102), we get a palindrome (51633588533615).

The spelling of 20121453121513 in words is "twenty trillion, one hundred twenty-one billion, four hundred fifty-three million, one hundred twenty-one thousand, five hundred thirteen".