212121110201001 has 8 divisors (see below), whose sum is σ = 283004144543424. Its totient is φ = 141326074662960.

The previous prime is 212121110200997. The next prime is 212121110201009. The reversal of 212121110201001 is 100102011121212.

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 212121110201001 - 2² = 212121110200997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212121110201009) 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, 21999695470 + ... + 21999705111.

It is an arithmetic number, because the mean of its divisors is an integer number (35375518067928).

Almost surely, 2^{212121110201001} is an apocalyptic number.

It is an amenable number.

212121110201001 is a deficient number, since it is larger than the sum of its proper divisors (70883034342423).

212121110201001 is a wasteful number, since it uses less digits than its factorization.

212121110201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43999402191.

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

Adding to 212121110201001 its reverse (100102011121212), we get a palindrome (312223121322213).

The spelling of 212121110201001 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred ten million, two hundred one thousand, one".