1213450211252 has 6 divisors (see below), whose sum is σ = 2123537869698. Its totient is φ = 606725105624.

The previous prime is 1213450211221. The next prime is 1213450211273. The reversal of 1213450211252 is 2521120543121.

It can be written as a sum of positive squares in only one way, i.e., 1110738935056 + 102711276196 = 1053916^2 + 320486^2 .

It is a super-2 number, since 2×1213450211252² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151681276403 + ... + 151681276410.

It is an arithmetic number, because the mean of its divisors is an integer number (353922978283).

Almost surely, 2^{1213450211252} is an apocalyptic number.

It is an amenable number.

1213450211252 is a deficient number, since it is larger than the sum of its proper divisors (910087658446).

1213450211252 is a wasteful number, since it uses less digits than its factorization.

1213450211252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303362552817 (or 303362552815 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 1213450211252 its reverse (2521120543121), we get a palindrome (3734570754373).

The spelling of 1213450211252 in words is "one trillion, two hundred thirteen billion, four hundred fifty million, two hundred eleven thousand, two hundred fifty-two".