121202242111 has 4 divisors (see below), whose sum is σ = 125381629800. Its totient is φ = 117022854424.

The previous prime is 121202242037. The next prime is 121202242159. The reversal of 121202242111 is 111242202121.

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 121202242111 - 2²¹ = 121200144959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202242211) 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, 2089693801 + ... + 2089693858.

It is an arithmetic number, because the mean of its divisors is an integer number (31345407450).

Almost surely, 2^121202242111 is an apocalyptic number.

121202242111 is a deficient number, since it is larger than the sum of its proper divisors (4179387689).

121202242111 is an equidigital number, since it uses as much as digits as its factorization.

121202242111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179387688.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121202242111 its reverse (111242202121), we get a palindrome (232444444232).

The spelling of 121202242111 in words is "one hundred twenty-one billion, two hundred two million, two hundred forty-two thousand, one hundred eleven".