121202020111 has 8 divisors (see below), whose sum is σ = 121306302144. Its totient is φ = 121097776800.

The previous prime is 121202020099. The next prime is 121202020123. The reversal of 121202020111 is 111020202121.

It is an interprime number because it is at equal distance from previous prime (121202020099) and next prime (121202020123).

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 121202020111 - 2⁹ = 121202019599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121202020091 and 121202020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202020141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11414841 + ... + 11425453.

It is an arithmetic number, because the mean of its divisors is an integer number (15163287768).

Almost surely, 2^121202020111 is an apocalyptic number.

121202020111 is a deficient number, since it is larger than the sum of its proper divisors (104282033).

121202020111 is a wasteful number, since it uses less digits than its factorization.

121202020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19361.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121202020111 its reverse (111020202121), we get a palindrome (232222222232).

The spelling of 121202020111 in words is "one hundred twenty-one billion, two hundred two million, twenty thousand, one hundred eleven".