13121420234 has 8 divisors (see below), whose sum is σ = 21196140420. Its totient is φ = 6056040096.

The previous prime is 13121420183. The next prime is 13121420237. The reversal of 13121420234 is 43202412131.

It can be written as a sum of positive squares in 2 ways, for example, as 10578739609 + 2542680625 = 102853^2 + 50425^2 .

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

It is a super-2 number, since 2×13121420234² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13121420237) 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, 252334979 + ... + 252335030.

Almost surely, 2^13121420234 is an apocalyptic number.

13121420234 is a deficient number, since it is larger than the sum of its proper divisors (8074720186).

13121420234 is a wasteful number, since it uses less digits than its factorization.

13121420234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504670024.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 13121420234 its reverse (43202412131), we get a palindrome (56323832365).

The spelling of 13121420234 in words is "thirteen billion, one hundred twenty-one million, four hundred twenty thousand, two hundred thirty-four".