121211122201011 has 36 divisors (see below), whose sum is σ = 184307391873696. Its totient is φ = 76705785613440.

The previous prime is 121211122200997. The next prime is 121211122201067. The reversal of 121211122201011 is 110102221112121.

It is a happy number.

121211122201011 is a `hidden beast` number, since 121 + 211 + 12 + 220 + 101 + 1 = 666.

It is not a de Polignac number, because 121211122201011 - 2⁶ = 121211122200947 is a prime.

It is a super-2 number, since 2×121211122201011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121211122201511) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 107708331 + ... + 108827876.

Almost surely, 2^{121211122201011} is an apocalyptic number.

121211122201011 is a deficient number, since it is larger than the sum of its proper divisors (63096269672685).

121211122201011 is a wasteful number, since it uses less digits than its factorization.

121211122201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216536332 (or 216536288 counting only the distinct ones).

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

Adding to 121211122201011 its reverse (110102221112121), we get a palindrome (231313343313132).

The spelling of 121211122201011 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred one thousand, eleven".