121221022102011 has 48 divisors (see below), whose sum is σ = 193197841986240. Its totient is φ = 72765803427840.

The previous prime is 121221022101973. The next prime is 121221022102043. The reversal of 121221022102011 is 110201220122121.

121221022102011 is a `hidden beast` number, since 1 + 21 + 221 + 0 + 221 + 0 + 201 + 1 = 666.

It is not a de Polignac number, because 121221022102011 - 2⁶ = 121221022101947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221022103011) 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, 26300035 + ... + 30563603.

It is an arithmetic number, because the mean of its divisors is an integer number (4024955041380).

Almost surely, 2^{121221022102011} is an apocalyptic number.

121221022102011 is a deficient number, since it is larger than the sum of its proper divisors (71976819884229).

121221022102011 is a wasteful number, since it uses less digits than its factorization.

121221022102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269556 (or 4269553 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121221022102011 its reverse (110201220122121), we get a palindrome (231422242224132).

The spelling of 121221022102011 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-two million, one hundred two thousand, eleven".