1221253176047 has 8 divisors (see below), whose sum is σ = 1222270913472. Its totient is φ = 1220235588000.

The previous prime is 1221253176037. The next prime is 1221253176067. The reversal of 1221253176047 is 7406713521221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221253176047 - 2²⁰ = 1221252127471 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221253175995 and 1221253176013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221253176037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21284297 + ... + 21341597.

It is an arithmetic number, because the mean of its divisors is an integer number (152783864184).

Almost surely, 2^{1221253176047} is an apocalyptic number.

1221253176047 is a deficient number, since it is larger than the sum of its proper divisors (1017737425).

1221253176047 is a wasteful number, since it uses less digits than its factorization.

1221253176047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74689.

The product of its (nonzero) digits is 141120, while the sum is 41.

Adding to 1221253176047 its reverse (7406713521221), we get a palindrome (8627966697268).

The spelling of 1221253176047 in words is "one trillion, two hundred twenty-one billion, two hundred fifty-three million, one hundred seventy-six thousand, forty-seven".