1302202121 has 6 divisors (see below), whose sum is σ = 1431346266. Its totient is φ = 1183820000.

The previous prime is 1302202093. The next prime is 1302202123. The reversal of 1302202121 is 1212022031.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 729270025 + 572932096 = 27005^2 + 23936^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1302202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1302202096 and 1302202105.

It is not an unprimeable number, because it can be changed into a prime (1302202123) 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, 5380880 + ... + 5381121.

It is an arithmetic number, because the mean of its divisors is an integer number (238557711).

Almost surely, 2^1302202121 is an apocalyptic number.

1302202121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1302202121 is a deficient number, since it is larger than the sum of its proper divisors (129144145).

1302202121 is a wasteful number, since it uses less digits than its factorization.

1302202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10762023 (or 10762012 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1302202121 is about 36086.0377570051. The cubic root of 1302202121 is about 1092.0087864978.

Adding to 1302202121 its reverse (1212022031), we get a palindrome (2514224152).

The spelling of 1302202121 in words is "one billion, three hundred two million, two hundred two thousand, one hundred twenty-one".