220121000002 has 8 divisors (see below), whose sum is σ = 332284567356. Its totient is φ = 109359477552.

The previous prime is 220120999999. The next prime is 220121000009. The reversal of 220121000002 is 200000121022.

It can be written as a sum of positive squares in 2 ways, for example, as 209479220721 + 10641779281 = 457689^2 + 103159^2 .

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 (220121000009) 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, 350510833 + ... + 350511460.

Almost surely, 2^220121000002 is an apocalyptic number.

220121000002 is a deficient number, since it is larger than the sum of its proper divisors (112163567354).

220121000002 is a wasteful number, since it uses less digits than its factorization.

220121000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701022452.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 220121000002 its reverse (200000121022), we get a palindrome (420121121024).

The spelling of 220121000002 in words is "two hundred twenty billion, one hundred twenty-one million, two", and thus it is an aban number.