220121201000 has 64 divisors (see below), whose sum is σ = 537478606080. Its totient is φ = 84220276800.

The previous prime is 220121200987. The next prime is 220121201009. The reversal of 220121201000 is 102121022.

It is a happy number.

220121201000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (220121201009) 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 15 ways as a sum of consecutive naturals, for example, 4762244 + ... + 4808243.

It is an arithmetic number, because the mean of its divisors is an integer number (8398103220).

Almost surely, 2^220121201000 is an apocalyptic number.

220121201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121201000 is an abundant number, since it is smaller than the sum of its proper divisors (317357405080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220121201000 is a wasteful number, since it uses less digits than its factorization.

220121201000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570531 (or 9570517 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220121201000 its reverse (102121022), we get a palindrome (220223322022).

The spelling of 220121201000 in words is "two hundred twenty billion, one hundred twenty-one million, two hundred one thousand".