121213420150231 has 4 divisors (see below), whose sum is σ = 123267884898600. Its totient is φ = 119158955401864.

The previous prime is 121213420150217. The next prime is 121213420150267. The reversal of 121213420150231 is 132051024312121.

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

It is not a de Polignac number, because 121213420150231 - 2²⁵ = 121213386595799 is a prime.

It is a super-2 number, since 2×121213420150231² (a number of 29 digits) contains 22 as substring.

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 121213420150231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213420150201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1027232374096 + ... + 1027232374213.

It is an arithmetic number, because the mean of its divisors is an integer number (30816971224650).

Almost surely, 2^{121213420150231} is an apocalyptic number.

121213420150231 is a deficient number, since it is larger than the sum of its proper divisors (2054464748369).

121213420150231 is an equidigital number, since it uses as much as digits as its factorization.

121213420150231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054464748368.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 121213420150231 its reverse (132051024312121), we get a palindrome (253264444462352).

The spelling of 121213420150231 in words is "one hundred twenty-one trillion, two hundred thirteen billion, four hundred twenty million, one hundred fifty thousand, two hundred thirty-one".