1204633166721 has 16 divisors (see below), whose sum is σ = 1700700264000. Its totient is φ = 755829739008.

The previous prime is 1204633166717. The next prime is 1204633166747. The reversal of 1204633166721 is 1276613364021.

It is not a de Polignac number, because 1204633166721 - 2² = 1204633166717 is a prime.

It is a super-2 number, since 2×1204633166721² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1204633166021) 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, 1985805 + ... + 2520453.

It is an arithmetic number, because the mean of its divisors is an integer number (106293766500).

Almost surely, 2^{1204633166721} is an apocalyptic number.

It is an amenable number.

1204633166721 is a deficient number, since it is larger than the sum of its proper divisors (496067097279).

1204633166721 is a wasteful number, since it uses less digits than its factorization.

1204633166721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578848.

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 1204633166721 in words is "one trillion, two hundred four billion, six hundred thirty-three million, one hundred sixty-six thousand, seven hundred twenty-one".