1221513214552 has 8 divisors (see below), whose sum is σ = 2290337277300. Its totient is φ = 610756607272.

The previous prime is 1221513214549. The next prime is 1221513214633. The reversal of 1221513214552 is 2554123151221.

It is a tau number, because it is divible by the number of its divisors (8).

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, 76344575902 + ... + 76344575917.

Almost surely, 2^{1221513214552} is an apocalyptic number.

It is an amenable number.

1221513214552 is a deficient number, since it is larger than the sum of its proper divisors (1068824062748).

1221513214552 is a wasteful number, since it uses less digits than its factorization.

1221513214552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152689151825 (or 152689151821 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

Adding to 1221513214552 its reverse (2554123151221), we get a palindrome (3775636365773).

The spelling of 1221513214552 in words is "one trillion, two hundred twenty-one billion, five hundred thirteen million, two hundred fourteen thousand, five hundred fifty-two".