1212521525303 has 16 divisors (see below), whose sum is σ = 1326248363904. Its totient is φ = 1099380915360.

The previous prime is 1212521525279. The next prime is 1212521525323. The reversal of 1212521525303 is 3035251252121.

It is a cyclic number.

It is not a de Polignac number, because 1212521525303 - 2²⁸ = 1212253089847 is a prime.

It is a super-2 number, since 2×1212521525303² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212521525303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212521525323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7361576 + ... + 7524482.

It is an arithmetic number, because the mean of its divisors is an integer number (82890522744).

Almost surely, 2^{1212521525303} is an apocalyptic number.

1212521525303 is a deficient number, since it is larger than the sum of its proper divisors (113726838601).

1212521525303 is a wasteful number, since it uses less digits than its factorization.

1212521525303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164702.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 1212521525303 its reverse (3035251252121), we get a palindrome (4247772777424).

The spelling of 1212521525303 in words is "one trillion, two hundred twelve billion, five hundred twenty-one million, five hundred twenty-five thousand, three hundred three".