121022101111 has 4 divisors (see below), whose sum is σ = 127391685400. Its totient is φ = 114652516824.

The previous prime is 121022101027. The next prime is 121022101117. The reversal of 121022101111 is 111101220121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111101220121 = 8447 ⋅13152743.

It is a cyclic number.

It is not a de Polignac number, because 121022101111 - 2¹¹ = 121022099063 is a prime.

It is a super-2 number, since 2×121022101111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121022101091 and 121022101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022101117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3184792116 + ... + 3184792153.

It is an arithmetic number, because the mean of its divisors is an integer number (31847921350).

Almost surely, 2^121022101111 is an apocalyptic number.

121022101111 is a deficient number, since it is larger than the sum of its proper divisors (6369584289).

121022101111 is an equidigital number, since it uses as much as digits as its factorization.

121022101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6369584288.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121022101111 its reverse (111101220121), we get a palindrome (232123321232).

The spelling of 121022101111 in words is "one hundred twenty-one billion, twenty-two million, one hundred one thousand, one hundred eleven".