121011220211 has 12 divisors (see below), whose sum is σ = 143763223968. Its totient is φ = 101517009552.

The previous prime is 121011220201. The next prime is 121011220217. The reversal of 121011220211 is 112022110121.

It is not a de Polignac number, because 121011220211 - 2⁶ = 121011220147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121011220217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26270216 + ... + 26274821.

It is an arithmetic number, because the mean of its divisors is an integer number (11980268664).

Almost surely, 2^121011220211 is an apocalyptic number.

121011220211 is a deficient number, since it is larger than the sum of its proper divisors (22752003757).

121011220211 is an equidigital number, since it uses as much as digits as its factorization.

121011220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52545098 (or 52545091 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121011220211 its reverse (112022110121), we get a palindrome (233033330332).

The spelling of 121011220211 in words is "one hundred twenty-one billion, eleven million, two hundred twenty thousand, two hundred eleven".