121021211012211 has 6 divisors (see below), whose sum is σ = 174808415906540. Its totient is φ = 80680807341468.

The previous prime is 121021211012183. The next prime is 121021211012249. The reversal of 121021211012211 is 112210112120121.

It is a happy number.

121021211012211 is a `hidden beast` number, since 1 + 210 + 21 + 211 + 0 + 1 + 221 + 1 = 666.

121021211012211 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 121021211012211 - 2⁷ = 121021211012083 is a prime.

It is a super-2 number, since 2×121021211012211² (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 (121021211022211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6723400611781 + ... + 6723400611798.

Almost surely, 2^{121021211012211} is an apocalyptic number.

121021211012211 is a deficient number, since it is larger than the sum of its proper divisors (53787204894329).

121021211012211 is a wasteful number, since it uses less digits than its factorization.

121021211012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13446801223585 (or 13446801223582 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121021211012211 its reverse (112210112120121), we get a palindrome (233231323132332).

The spelling of 121021211012211 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred eleven million, twelve thousand, two hundred eleven".