1212013525 has 12 divisors (see below), whose sum is σ = 1523486692. Its totient is φ = 956327040.

The previous prime is 1212013493. The next prime is 1212013529. The reversal of 1212013525 is 5253102121.

It can be written as a sum of positive squares in 6 ways, for example, as 66732561 + 1145280964 = 8169^2 + 33842^2 .

It is not a de Polignac number, because 1212013525 - 2⁵ = 1212013493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212013496 and 1212013505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212013529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330234 + ... + 333883.

Almost surely, 2^1212013525 is an apocalyptic number.

It is an amenable number.

1212013525 is a deficient number, since it is larger than the sum of its proper divisors (311473167).

1212013525 is an equidigital number, since it uses as much as digits as its factorization.

1212013525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664200 (or 664195 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1212013525 is about 34813.9846182536. The cubic root of 1212013525 is about 1066.1929881965.

Adding to 1212013525 its reverse (5253102121), we get a palindrome (6465115646).

The spelling of 1212013525 in words is "one billion, two hundred twelve million, thirteen thousand, five hundred twenty-five".