121210121213031 has 4 divisors (see below), whose sum is σ = 161613494950712. Its totient is φ = 80806747475352.

The previous prime is 121210121213029. The next prime is 121210121213057. The reversal of 121210121213031 is 130312121012121.

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

It is not a de Polignac number, because 121210121213031 - 2¹ = 121210121213029 is a prime.

It is a super-2 number, since 2×121210121213031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121210121212989 and 121210121213007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210121213231) 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, 20201686868836 + ... + 20201686868841.

It is an arithmetic number, because the mean of its divisors is an integer number (40403373737678).

Almost surely, 2^{121210121213031} is an apocalyptic number.

121210121213031 is a deficient number, since it is larger than the sum of its proper divisors (40403373737681).

121210121213031 is an equidigital number, since it uses as much as digits as its factorization.

121210121213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40403373737680.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 121210121213031 its reverse (130312121012121), we get a palindrome (251522242225152).

The spelling of 121210121213031 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty-one million, two hundred thirteen thousand, thirty-one".