121011220111 has 8 divisors (see below), whose sum is σ = 123071585040. Its totient is φ = 118951166208.

The previous prime is 121011220087. The next prime is 121011220123. The reversal of 121011220111 is 111022110121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121011220111 - 2⁷ = 121011219983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121011220091 and 121011220100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011220151) 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, 788415 + ... + 929311.

It is an arithmetic number, because the mean of its divisors is an integer number (15383948130).

Almost surely, 2^121011220111 is an apocalyptic number.

121011220111 is a deficient number, since it is larger than the sum of its proper divisors (2060364929).

121011220111 is a wasteful number, since it uses less digits than its factorization.

121011220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155513.

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

Adding to 121011220111 its reverse (111022110121), we get a palindrome (232033330232).

The spelling of 121011220111 in words is "one hundred twenty-one billion, eleven million, two hundred twenty thousand, one hundred eleven".