121022221211 has 4 divisors (see below), whose sum is σ = 121056891624. Its totient is φ = 120987550800.

The previous prime is 121022221207. The next prime is 121022221253. The reversal of 121022221211 is 112122220121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112122220121 = 17 ⋅6595424713.

It is a cyclic number.

It is not a de Polignac number, because 121022221211 - 2² = 121022221207 is a prime.

It is a super-4 number, since 4×121022221211⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121022221211.

It is not an unprimeable number, because it can be changed into a prime (121022221291) 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, 17329970 + ... + 17336951.

It is an arithmetic number, because the mean of its divisors is an integer number (30264222906).

Almost surely, 2^121022221211 is an apocalyptic number.

121022221211 is a deficient number, since it is larger than the sum of its proper divisors (34670413).

121022221211 is an equidigital number, since it uses as much as digits as its factorization.

121022221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34670412.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121022221211 its reverse (112122220121), we get a palindrome (233144441332).

The spelling of 121022221211 in words is "one hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, two hundred eleven".