121211120010111 has 8 divisors (see below), whose sum is σ = 161614938207360. Its totient is φ = 80807357576472.

The previous prime is 121211120010103. The next prime is 121211120010119. The reversal of 121211120010111 is 111010021112121.

It is an interprime number because it is at equal distance from previous prime (121211120010103) and next prime (121211120010119).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121211120010111 - 2³ = 121211120010103 is a prime.

It is a super-2 number, since 2×121211120010111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211120010119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8573851 + ... + 17774508.

It is an arithmetic number, because the mean of its divisors is an integer number (20201867275920).

Almost surely, 2^{121211120010111} is an apocalyptic number.

121211120010111 is a deficient number, since it is larger than the sum of its proper divisors (40403818197249).

121211120010111 is a wasteful number, since it uses less digits than its factorization.

121211120010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27881805.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121211120010111 its reverse (111010021112121), we get a palindrome (232221141122232).

The spelling of 121211120010111 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred twenty million, ten thousand, one hundred eleven".