1220021221001 has 8 divisors (see below), whose sum is σ = 1335184424544. Its totient is φ = 1105566714720.

The previous prime is 1220021220973. The next prime is 1220021221007. The reversal of 1220021221001 is 1001221200221.

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 1220021221001 - 2¹⁴ = 1220021204617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220021221007) 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, 177170711 + ... + 177177596.

It is an arithmetic number, because the mean of its divisors is an integer number (166898053068).

Almost surely, 2^{1220021221001} is an apocalyptic number.

1220021221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220021221001 is a deficient number, since it is larger than the sum of its proper divisors (115163203543).

1220021221001 is a wasteful number, since it uses less digits than its factorization.

1220021221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354348631.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220021221001 its reverse (1001221200221), we get a palindrome (2221242421222).

The spelling of 1220021221001 in words is "one trillion, two hundred twenty billion, twenty-one million, two hundred twenty-one thousand, one".