2121221210210 has 32 divisors (see below), whose sum is σ = 4024124323200. Its totient is φ = 802837526400.

The previous prime is 2121221210161. The next prime is 2121221210219. The reversal of 2121221210210 is 120121221212.

It is not an unprimeable number, because it can be changed into a prime (2121221210219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6746366 + ... + 7053785.

It is an arithmetic number, because the mean of its divisors is an integer number (125753885100).

Almost surely, 2^{2121221210210} is an apocalyptic number.

2121221210210 is a deficient number, since it is larger than the sum of its proper divisors (1902903112990).

2121221210210 is a wasteful number, since it uses less digits than its factorization.

2121221210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13800986.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2121221210210 its reverse (120121221212), we get a palindrome (2241342431422).

The spelling of 2121221210210 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, two hundred ten".