2201121000020 has 24 divisors (see below), whose sum is σ = 4698130399368. Its totient is φ = 866014819200.

The previous prime is 2201121000007. The next prime is 2201121000061. The reversal of 2201121000020 is 200001211022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 240174485776 + 1960946514244 = 490076^2 + 1400338^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2201120999965 and 2201121000010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902097551 + ... + 902099990.

It is an arithmetic number, because the mean of its divisors is an integer number (195755433307).

Almost surely, 2^{2201121000020} is an apocalyptic number.

2201121000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201121000020 is an abundant number, since it is smaller than the sum of its proper divisors (2497009399348).

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

2201121000020 is a wasteful number, since it uses less digits than its factorization.

2201121000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804197611 (or 1804197609 counting only the distinct ones).

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

Adding to 2201121000020 its reverse (200001211022), we get a palindrome (2401122211042).

The spelling of 2201121000020 in words is "two trillion, two hundred one billion, one hundred twenty-one million, twenty", and thus it is an aban number.