1221721071122 has 8 divisors (see below), whose sum is σ = 1833093083136. Its totient is φ = 610690043412.

The previous prime is 1221721071107. The next prime is 1221721071127. The reversal of 1221721071122 is 2211701271221.

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

It is not an unprimeable number, because it can be changed into a prime (1221721071127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85237118 + ... + 85251449.

It is an arithmetic number, because the mean of its divisors is an integer number (229136635392).

Almost surely, 2^{1221721071122} is an apocalyptic number.

1221721071122 is a deficient number, since it is larger than the sum of its proper divisors (611372012014).

1221721071122 is a wasteful number, since it uses less digits than its factorization.

1221721071122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170492152.

The product of its (nonzero) digits is 1568, while the sum is 29.

The spelling of 1221721071122 in words is "one trillion, two hundred twenty-one billion, seven hundred twenty-one million, seventy-one thousand, one hundred twenty-two".