121211112001 has 8 divisors (see below), whose sum is σ = 142995597824. Its totient is φ = 100543779360.

The previous prime is 121211111999. The next prime is 121211112013. The reversal of 121211112001 is 100211112121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121211112001 - 2¹ = 121211111999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211112041) 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, 279288060 + ... + 279288493.

It is an arithmetic number, because the mean of its divisors is an integer number (17874449728).

Almost surely, 2^121211112001 is an apocalyptic number.

It is an amenable number.

121211112001 is a deficient number, since it is larger than the sum of its proper divisors (21784485823).

121211112001 is an equidigital number, since it uses as much as digits as its factorization.

121211112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558576591.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121211112001 its reverse (100211112121), we get a palindrome (221422224122).

The spelling of 121211112001 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, one".