121211022211 has 4 divisors (see below), whose sum is σ = 121211864424. Its totient is φ = 121210180000.

The previous prime is 121211022203. The next prime is 121211022221. The reversal of 121211022211 is 112220112121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121211022211 - 2³ = 121211022203 is a prime.

It is a super-2 number, since 2×121211022211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211022221) 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, 144790 + ... + 513211.

It is an arithmetic number, because the mean of its divisors is an integer number (30302966106).

Almost surely, 2^121211022211 is an apocalyptic number.

121211022211 is a deficient number, since it is larger than the sum of its proper divisors (842213).

121211022211 is an equidigital number, since it uses as much as digits as its factorization.

121211022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842212.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121211022211 its reverse (112220112121), we get a palindrome (233431134332).

It can be divided in two parts, 1212110 and 22211, that added together give a palindrome (1234321).

The spelling of 121211022211 in words is "one hundred twenty-one billion, two hundred eleven million, twenty-two thousand, two hundred eleven".