1210000002228 has 18 divisors (see below), whose sum is σ = 3058611116834. Its totient is φ = 403333334064.

The previous prime is 1210000002209. The next prime is 1210000002229. The reversal of 1210000002228 is 8222000000121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1025557239204 + 184442763024 = 1012698^2 + 429468^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1210000002228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210000002229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16805555551 + ... + 16805555622.

Almost surely, 2^{1210000002228} is an apocalyptic number.

1210000002228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1210000002228 is an abundant number, since it is smaller than the sum of its proper divisors (1848611114606).

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

1210000002228 is a wasteful number, since it uses less digits than its factorization.

1210000002228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33611111183 (or 33611111178 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1210000002228 its reverse (8222000000121), we get a palindrome (9432000002349).

The spelling of 1210000002228 in words is "one trillion, two hundred ten billion, two thousand, two hundred twenty-eight".