1211320234552 has 16 divisors (see below), whose sum is σ = 2271245185440. Its totient is φ = 605654851776.

The previous prime is 1211320234517. The next prime is 1211320234577. The reversal of 1211320234552 is 2554320231121.

It is a happy number.

It is a super-2 number, since 2×1211320234552² (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 in 3 ways as a sum of consecutive naturals, for example, 424228 + ... + 1613260.

It is an arithmetic number, because the mean of its divisors is an integer number (141952824090).

Almost surely, 2^{1211320234552} is an apocalyptic number.

It is an amenable number.

1211320234552 is a deficient number, since it is larger than the sum of its proper divisors (1059924950888).

1211320234552 is a wasteful number, since it uses less digits than its factorization.

1211320234552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316382 (or 1316378 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1211320234552 its reverse (2554320231121), we get a palindrome (3765640465673).

The spelling of 1211320234552 in words is "one trillion, two hundred eleven billion, three hundred twenty million, two hundred thirty-four thousand, five hundred fifty-two".