1220100223021 has 8 divisors (see below), whose sum is σ = 1235006154144. Its totient is φ = 1205199195120.

The previous prime is 1220100222989. The next prime is 1220100223039. The reversal of 1220100223021 is 1203220010221.

It is a happy number.

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 1220100223021 - 2⁵ = 1220100222989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220100222986 and 1220100223004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220100223051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723846 + ... + 1721671.

It is an arithmetic number, because the mean of its divisors is an integer number (154375769268).

Almost surely, 2^{1220100223021} is an apocalyptic number.

It is an amenable number.

1220100223021 is a deficient number, since it is larger than the sum of its proper divisors (14905931123).

1220100223021 is an equidigital number, since it uses as much as digits as its factorization.

1220100223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451611.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1220100223021 its reverse (1203220010221), we get a palindrome (2423320233242).

The spelling of 1220100223021 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred twenty-three thousand, twenty-one".