1212203025 has 72 divisors (see below), whose sum is σ = 2375365824. Its totient is φ = 586051200.

The previous prime is 1212203009. The next prime is 1212203029. The reversal of 1212203025 is 5203022121.

It is not a de Polignac number, because 1212203025 - 2⁴ = 1212203009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212202989 and 1212203007.

It is not an unprimeable number, because it can be changed into a prime (1212203029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1600947 + ... + 1601703.

It is an arithmetic number, because the mean of its divisors is an integer number (32991192).

Almost surely, 2^1212203025 is an apocalyptic number.

1212203025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212203025 is a deficient number, since it is larger than the sum of its proper divisors (1163162799).

1212203025 is a wasteful number, since it uses less digits than its factorization.

1212203025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1212203025 is about 34816.7061193330. The cubic root of 1212203025 is about 1066.2485522195.

Adding to 1212203025 its reverse (5203022121), we get a palindrome (6415225146).

The spelling of 1212203025 in words is "one billion, two hundred twelve million, two hundred three thousand, twenty-five".