1220002110421 has 8 divisors (see below), whose sum is σ = 1239570653720. Its totient is φ = 1200510761472.

The previous prime is 1220002110373. The next prime is 1220002110479. The reversal of 1220002110421 is 1240112000221.

It can be written as a sum of positive squares in 4 ways, for example, as 24721272900 + 1195280837521 = 157230^2 + 1093289^2 .

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 1220002110421 - 2⁷ = 1220002110293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220002110395 and 1220002110404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220002114421) 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, 19266726 + ... + 19329943.

It is an arithmetic number, because the mean of its divisors is an integer number (154946331715).

Almost surely, 2^{1220002110421} is an apocalyptic number.

It is an amenable number.

1220002110421 is a deficient number, since it is larger than the sum of its proper divisors (19568543299).

1220002110421 is an equidigital number, since it uses as much as digits as its factorization.

1220002110421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38597175.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220002110421 its reverse (1240112000221), we get a palindrome (2460114110642).

The spelling of 1220002110421 in words is "one trillion, two hundred twenty billion, two million, one hundred ten thousand, four hundred twenty-one".