121123012310213 has 4 divisors (see below), whose sum is σ = 126389230236768. Its totient is φ = 115856794383660.

The previous prime is 121123012310189. The next prime is 121123012310249. The reversal of 121123012310213 is 312013210321121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121123012310213 - 2⁴² = 116724965799109 is a prime.

It is a super-2 number, since 2×121123012310213² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 5266217926531 = 121123012310213 / (1 + 2 + 1 + 1 + 2 + 3 + 0 + 1 + 2 + 3 + 1 + 0 + 2 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123012310413) 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, 2633108963243 + ... + 2633108963288.

It is an arithmetic number, because the mean of its divisors is an integer number (31597307559192).

Almost surely, 2^{121123012310213} is an apocalyptic number.

It is an amenable number.

121123012310213 is a deficient number, since it is larger than the sum of its proper divisors (5266217926555).

121123012310213 is an equidigital number, since it uses as much as digits as its factorization.

121123012310213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5266217926554.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 121123012310213 its reverse (312013210321121), we get a palindrome (433136222631334).

The spelling of 121123012310213 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, twelve million, three hundred ten thousand, two hundred thirteen".