121220302312013 has 8 divisors (see below), whose sum is σ = 123902070425208. Its totient is φ = 118553148739584.

The previous prime is 121220302311989. The next prime is 121220302312033. The reversal of 121220302312013 is 310213203022121.

It can be written as a sum of positive squares in 4 ways, for example, as 35828054089 + 121184474257924 = 189283^2 + 11008382^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121220302312013 is a prime.

It is a super-2 number, since 2×121220302312013² (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 121220302312013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220302312033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3653618420 + ... + 3653651597.

It is an arithmetic number, because the mean of its divisors is an integer number (15487758803151).

Almost surely, 2^{121220302312013} is an apocalyptic number.

It is an amenable number.

121220302312013 is a deficient number, since it is larger than the sum of its proper divisors (2681768113195).

121220302312013 is an equidigital number, since it uses as much as digits as its factorization.

121220302312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7307270383.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 121220302312013 its reverse (310213203022121), we get a palindrome (431433505334134).

The spelling of 121220302312013 in words is "one hundred twenty-one trillion, two hundred twenty billion, three hundred two million, three hundred twelve thousand, thirteen".