2201220121000 has 32 divisors (see below), whose sum is σ = 5150855085480. Its totient is φ = 880488048000.

The previous prime is 2201220120997. The next prime is 2201220121013. The reversal of 2201220121000 is 1210221022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 362435304676 + 1838784816324 = 602026^2 + 1356018^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1100609061 + ... + 1100611060.

Almost surely, 2^{2201220121000} is an apocalyptic number.

2201220121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201220121000 is an abundant number, since it is smaller than the sum of its proper divisors (2949634964480).

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

2201220121000 is a wasteful number, since it uses less digits than its factorization.

2201220121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201220142 (or 2201220128 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2201220121000 its reverse (1210221022), we get a palindrome (2202430342022).

The spelling of 2201220121000 in words is "two trillion, two hundred one billion, two hundred twenty million, one hundred twenty-one thousand".