1302121013 has 8 divisors (see below), whose sum is σ = 1333573848. Its totient is φ = 1270923264.

The previous prime is 1302120971. The next prime is 1302121027. The reversal of 1302121013 is 3101212031.

It can be written as a sum of positive squares in 4 ways, for example, as 395930404 + 906190609 = 19898^2 + 30103^2 .

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-1302121013 is a prime.

It is a super-2 number, since 2×1302121013² = 3391038264992292338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302121033) 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, 53420 + ... + 73877.

It is an arithmetic number, because the mean of its divisors is an integer number (166696731).

Almost surely, 2^1302121013 is an apocalyptic number.

It is an amenable number.

1302121013 is a deficient number, since it is larger than the sum of its proper divisors (31452835).

1302121013 is a wasteful number, since it uses less digits than its factorization.

1302121013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127543.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1302121013 is about 36084.9139253511. The cubic root of 1302121013 is about 1091.9861140094.

Adding to 1302121013 its reverse (3101212031), we get a palindrome (4403333044).

The spelling of 1302121013 in words is "one billion, three hundred two million, one hundred twenty-one thousand, thirteen".