212122112001 has 4 divisors (see below), whose sum is σ = 282829482672. Its totient is φ = 141414741332.

The previous prime is 212122111979. The next prime is 212122112011. The reversal of 212122112001 is 100211221212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212122112001 - 2³⁰ = 211048370177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212122112011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35353685331 + ... + 35353685336.

It is an arithmetic number, because the mean of its divisors is an integer number (70707370668).

Almost surely, 2^212122112001 is an apocalyptic number.

It is an amenable number.

212122112001 is a deficient number, since it is larger than the sum of its proper divisors (70707370671).

212122112001 is an equidigital number, since it uses as much as digits as its factorization.

212122112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70707370670.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212122112001 its reverse (100211221212), we get a palindrome (312333333213).

The spelling of 212122112001 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred twelve thousand, one".