121020110111121 has 16 divisors (see below), whose sum is σ = 173785783449600. Its totient is φ = 74468206350720.

The previous prime is 121020110111101. The next prime is 121020110111141. The reversal of 121020110111121 is 121111011020121.

It is an interprime number because it is at equal distance from previous prime (121020110111101) and next prime (121020110111141).

It is not a de Polignac number, because 121020110111121 - 2²¹ = 121020108013969 is a prime.

It is a super-3 number, since 3×121020110111121³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121020110111121.

It is not an unprimeable number, because it can be changed into a prime (121020110111101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118392145 + ... + 119409966.

It is an arithmetic number, because the mean of its divisors is an integer number (10861611465600).

Almost surely, 2^{121020110111121} is an apocalyptic number.

It is an amenable number.

121020110111121 is a deficient number, since it is larger than the sum of its proper divisors (52765673338479).

121020110111121 is a wasteful number, since it uses less digits than its factorization.

121020110111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237815176.

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

Adding to 121020110111121 its reverse (121111011020121), we get a palindrome (242131121131242).

The spelling of 121020110111121 in words is "one hundred twenty-one trillion, twenty billion, one hundred ten million, one hundred eleven thousand, one hundred twenty-one".