1216002125 has 64 divisors (see below), whose sum is σ = 1710858240. Its totient is φ = 856800000.

The previous prime is 1216002083. The next prime is 1216002167. The reversal of 1216002125 is 5212006121.

It is an interprime number because it is at equal distance from previous prime (1216002083) and next prime (1216002167).

It is a de Polignac number, because none of the positive numbers 2^k-1216002125 is a prime.

It is a super-2 number, since 2×1216002125² = 2957322336009031250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1216002097 and 1216002106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5087756 + ... + 5087994.

It is an arithmetic number, because the mean of its divisors is an integer number (26732160).

Almost surely, 2^1216002125 is an apocalyptic number.

It is an amenable number.

1216002125 is a deficient number, since it is larger than the sum of its proper divisors (494856115).

1216002125 is a wasteful number, since it uses less digits than its factorization.

1216002125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1216002125 is about 34871.2220175892. Note that the first 3 decimals coincide. The cubic root of 1216002125 is about 1067.3612812377.

Adding to 1216002125 its reverse (5212006121), we get a palindrome (6428008246).

The spelling of 1216002125 in words is "one billion, two hundred sixteen million, two thousand, one hundred twenty-five".