1220851328851 has 8 divisors (see below), whose sum is σ = 1522100358144. Its totient is φ = 951312723720.

The previous prime is 1220851328761. The next prime is 1220851328929. The reversal of 1220851328851 is 1588231580221.

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 1220851328851 - 2¹⁵ = 1220851296083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220851320851) 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, 7927605955 + ... + 7927606108.

It is an arithmetic number, because the mean of its divisors is an integer number (190262544768).

Almost surely, 2^{1220851328851} is an apocalyptic number.

1220851328851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220851328851 is a deficient number, since it is larger than the sum of its proper divisors (301249029293).

1220851328851 is a wasteful number, since it uses less digits than its factorization.

1220851328851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15855212081.

The product of its (nonzero) digits is 307200, while the sum is 46.

The spelling of 1220851328851 in words is "one trillion, two hundred twenty billion, eight hundred fifty-one million, three hundred twenty-eight thousand, eight hundred fifty-one".