121010202122111 has 4 divisors (see below), whose sum is σ = 122816324541912. Its totient is φ = 119204079702312.

The previous prime is 121010202122107. The next prime is 121010202122221. The reversal of 121010202122111 is 111221202010121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121010202122111 - 2² = 121010202122107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121010202122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010202128111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903061209800 + ... + 903061209933.

It is an arithmetic number, because the mean of its divisors is an integer number (30704081135478).

Almost surely, 2^{121010202122111} is an apocalyptic number.

121010202122111 is a deficient number, since it is larger than the sum of its proper divisors (1806122419801).

121010202122111 is an equidigital number, since it uses as much as digits as its factorization.

121010202122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806122419800.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121010202122111 its reverse (111221202010121), we get a palindrome (232231404132232).

The spelling of 121010202122111 in words is "one hundred twenty-one trillion, ten billion, two hundred two million, one hundred twenty-two thousand, one hundred eleven".