121121210022211 has 4 divisors (see below), whose sum is σ = 138424240025392. Its totient is φ = 103818180019032.

The previous prime is 121121210022173. The next prime is 121121210022289. The reversal of 121121210022211 is 112220012121121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121121210022211 - 2⁷ = 121121210022083 is a prime.

It is a super-2 number, since 2×121121210022211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121210022511) 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, 8651515001580 + ... + 8651515001593.

It is an arithmetic number, because the mean of its divisors is an integer number (34606060006348).

Almost surely, 2^{121121210022211} is an apocalyptic number.

121121210022211 is a deficient number, since it is larger than the sum of its proper divisors (17303030003181).

121121210022211 is an equidigital number, since it uses as much as digits as its factorization.

121121210022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17303030003180.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121121210022211 its reverse (112220012121121), we get a palindrome (233341222143332).

The spelling of 121121210022211 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred ten million, twenty-two thousand, two hundred eleven".