121202123312011 has 4 divisors (see below), whose sum is σ = 138516712356592. Its totient is φ = 103887534267432.

The previous prime is 121202123311957. The next prime is 121202123312111. The reversal of 121202123312011 is 110213321202121.

It is a happy number.

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 121202123312011 - 2⁷ = 121202123311883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121202123312111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8657294522280 + ... + 8657294522293.

It is an arithmetic number, because the mean of its divisors is an integer number (34629178089148).

Almost surely, 2^{121202123312011} is an apocalyptic number.

121202123312011 is a deficient number, since it is larger than the sum of its proper divisors (17314589044581).

121202123312011 is an equidigital number, since it uses as much as digits as its factorization.

121202123312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17314589044580.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121202123312011 its reverse (110213321202121), we get a palindrome (231415444514132).

The spelling of 121202123312011 in words is "one hundred twenty-one trillion, two hundred two billion, one hundred twenty-three million, three hundred twelve thousand, eleven".