1212112211001 has 8 divisors (see below), whose sum is σ = 1646643003840. Its totient is φ = 792828112752.

The previous prime is 1212112210973. The next prime is 1212112211003. The reversal of 1212112211001 is 1001122112121.

It is a happy number.

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

It is not a de Polignac number, because 1212112211001 - 2¹⁴ = 1212112194617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212112211003) 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, 3811673461 + ... + 3811673778.

It is an arithmetic number, because the mean of its divisors is an integer number (205830375480).

Almost surely, 2^{1212112211001} is an apocalyptic number.

It is an amenable number.

1212112211001 is a deficient number, since it is larger than the sum of its proper divisors (434530792839).

1212112211001 is an equidigital number, since it uses as much as digits as its factorization.

1212112211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7623347295.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212112211001 its reverse (1001122112121), we get a palindrome (2213234323122).

The spelling of 1212112211001 in words is "one trillion, two hundred twelve billion, one hundred twelve million, two hundred eleven thousand, one".