1212320051005 has 32 divisors (see below), whose sum is σ = 1735023919104. Its totient is φ = 795103653696.

The previous prime is 1212320051003. The next prime is 1212320051081. The reversal of 1212320051005 is 5001500232121.

It is a cyclic number.

It is not a de Polignac number, because 1212320051005 - 2¹ = 1212320051003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212320051003) 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, 12935544 + ... + 13028926.

It is an arithmetic number, because the mean of its divisors is an integer number (54219497472).

Almost surely, 2^{1212320051005} is an apocalyptic number.

It is an amenable number.

1212320051005 is a deficient number, since it is larger than the sum of its proper divisors (522703868099).

1212320051005 is a wasteful number, since it uses less digits than its factorization.

1212320051005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109545.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 1212320051005 its reverse (5001500232121), we get a palindrome (6213820283126).

The spelling of 1212320051005 in words is "one trillion, two hundred twelve billion, three hundred twenty million, fifty-one thousand, five".