1212021210005 has 8 divisors (see below), whose sum is σ = 1454453018424. Its totient is φ = 969598590400.

The previous prime is 1212021209989. The next prime is 1212021210031. The reversal of 1212021210005 is 5000121202121.

It can be written as a sum of positive squares in 4 ways, for example, as 5312368996 + 1206708841009 = 72886^2 + 1098503^2 .

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

It is not a de Polignac number, because 1212021210005 - 2⁴ = 1212021209989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2003606 + ... + 2537415.

It is an arithmetic number, because the mean of its divisors is an integer number (181806627303).

Almost surely, 2^{1212021210005} is an apocalyptic number.

It is an amenable number.

1212021210005 is a deficient number, since it is larger than the sum of its proper divisors (242431808419).

1212021210005 is an equidigital number, since it uses as much as digits as its factorization.

1212021210005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4594407.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 1212021210005 its reverse (5000121202121), we get a palindrome (6212142412126).

The spelling of 1212021210005 in words is "one trillion, two hundred twelve billion, twenty-one million, two hundred ten thousand, five".