1331202123 has 6 divisors (see below), whose sum is σ = 1922847524. Its totient is φ = 887468076.

The previous prime is 1331202121. The next prime is 1331202133. The reversal of 1331202123 is 3212021331.

It is not a de Polignac number, because 1331202123 - 2¹ = 1331202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331202096 and 1331202105.

It is not an unprimeable number, because it can be changed into a prime (1331202121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73955665 + ... + 73955682.

Almost surely, 2^1331202123 is an apocalyptic number.

1331202123 is a deficient number, since it is larger than the sum of its proper divisors (591645401).

1331202123 is a wasteful number, since it uses less digits than its factorization.

1331202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147911353 (or 147911350 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1331202123 is about 36485.6426968198. The cubic root of 1331202123 is about 1100.0556784489.

Adding to 1331202123 its reverse (3212021331), we get a palindrome (4543223454).

The spelling of 1331202123 in words is "one billion, three hundred thirty-one million, two hundred two thousand, one hundred twenty-three".