121221021221211 has 8 divisors (see below), whose sum is σ = 161732371766800. Its totient is φ = 80761842411552.

The previous prime is 121221021221197. The next prime is 121221021221219. The reversal of 121221021221211 is 112122120122121.

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

It is not a de Polignac number, because 121221021221211 - 2⁹ = 121221021220699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221021221219) 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, 13042928560 + ... + 13042937853.

It is an arithmetic number, because the mean of its divisors is an integer number (20216546470850).

Almost surely, 2^{121221021221211} is an apocalyptic number.

121221021221211 is a deficient number, since it is larger than the sum of its proper divisors (40511350545589).

121221021221211 is a wasteful number, since it uses less digits than its factorization.

121221021221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26085867965.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121221021221211 its reverse (112122120122121), we get a palindrome (233343141343332).

The spelling of 121221021221211 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred twenty-one thousand, two hundred eleven".