2101221400210 has 8 divisors (see below), whose sum is σ = 3782198520396. Its totient is φ = 840488560080.

The previous prime is 2101221400177. The next prime is 2101221400259. The reversal of 2101221400210 is 120041221012.

It can be written as a sum of positive squares in 2 ways, for example, as 2075043131001 + 26178269209 = 1440501^2 + 161797^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105061070001 + ... + 105061070020.

Almost surely, 2^{2101221400210} is an apocalyptic number.

2101221400210 is a deficient number, since it is larger than the sum of its proper divisors (1680977120186).

2101221400210 is a wasteful number, since it uses less digits than its factorization.

2101221400210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210122140028.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2101221400210 its reverse (120041221012), we get a palindrome (2221262621222).

The spelling of 2101221400210 in words is "two trillion, one hundred one billion, two hundred twenty-one million, four hundred thousand, two hundred ten".