1228000317621 has 16 divisors (see below), whose sum is σ = 2041351177728. Its totient is φ = 637922242800.

The previous prime is 1228000317613. The next prime is 1228000317637. The reversal of 1228000317621 is 1267130008221.

It is not a de Polignac number, because 1228000317621 - 2³ = 1228000317613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228000317421) 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, 2658009115 + ... + 2658009576.

It is an arithmetic number, because the mean of its divisors is an integer number (127584448608).

Almost surely, 2^{1228000317621} is an apocalyptic number.

1228000317621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1228000317621 is a deficient number, since it is larger than the sum of its proper divisors (813350860107).

1228000317621 is a wasteful number, since it uses less digits than its factorization.

1228000317621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316018712.

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 1228000317621 in words is "one trillion, two hundred twenty-eight billion, three hundred seventeen thousand, six hundred twenty-one".