2121221000210 has 16 divisors (see below), whose sum is σ = 4111905323736. Its totient is φ = 783220061568.

The previous prime is 2121221000209. The next prime is 2121221000263. The reversal of 2121221000210 is 120001221212.

It can be written as a sum of positive squares in 4 ways, for example, as 863927493529 + 1257293506681 = 929477^2 + 1121291^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8158542179 + ... + 8158542438.

Almost surely, 2^{2121221000210} is an apocalyptic number.

2121221000210 is a deficient number, since it is larger than the sum of its proper divisors (1990684323526).

2121221000210 is a wasteful number, since it uses less digits than its factorization.

2121221000210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16317084637.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121221000210 its reverse (120001221212), we get a palindrome (2241222221422).

The spelling of 2121221000210 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred ten", and thus it is an aban number.