1220856801 has 8 divisors (see below), whose sum is σ = 1629185184. Its totient is φ = 813216480.

The previous prime is 1220856779. The next prime is 1220856803. The reversal of 1220856801 is 1086580221.

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

It is not a de Polignac number, because 1220856801 - 2⁶ = 1220856737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220856803) 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, 167860 + ... + 174981.

It is an arithmetic number, because the mean of its divisors is an integer number (203648148).

Almost surely, 2^1220856801 is an apocalyptic number.

It is an amenable number.

1220856801 is a deficient number, since it is larger than the sum of its proper divisors (408328383).

1220856801 is a wasteful number, since it uses less digits than its factorization.

1220856801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344031.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 1220856801 is about 34940.7613111106. The cubic root of 1220856801 is about 1068.7798129641.

The spelling of 1220856801 in words is "one billion, two hundred twenty million, eight hundred fifty-six thousand, eight hundred one".