121101221111211 has 48 divisors (see below), whose sum is σ = 193292308984320. Its totient is φ = 72446649912000.

The previous prime is 121101221111209. The next prime is 121101221111219. The reversal of 121101221111211 is 112111122101121.

121101221111211 is a `hidden beast` number, since 1 + 21 + 101 + 221 + 111 + 211 = 666.

It is not a de Polignac number, because 121101221111211 - 2¹ = 121101221111209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121101221111219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27857856 + ... + 31910226.

It is an arithmetic number, because the mean of its divisors is an integer number (4026923103840).

Almost surely, 2^{121101221111211} is an apocalyptic number.

121101221111211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121101221111211 is a deficient number, since it is larger than the sum of its proper divisors (72191087873109).

121101221111211 is a wasteful number, since it uses less digits than its factorization.

121101221111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056288 (or 4056285 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 121101221111211 its reverse (112111122101121), we get a palindrome (233212343212332).

The spelling of 121101221111211 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred twenty-one million, one hundred eleven thousand, two hundred eleven".