2121111100210 has 16 divisors (see below), whose sum is σ = 3874985055936. Its totient is φ = 835781089968.

The previous prime is 2121111100189. The next prime is 2121111100237. The reversal of 2121111100210 is 120011111212.

It is a happy number.

It is a super-2 number, since 2×2121111100210² (a number of 25 digits) contains 22 as substring.

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, 1582918062 + ... + 1582919401.

It is an arithmetic number, because the mean of its divisors is an integer number (242186565996).

Almost surely, 2^{2121111100210} is an apocalyptic number.

2121111100210 is a deficient number, since it is larger than the sum of its proper divisors (1753873955726).

2121111100210 is a wasteful number, since it uses less digits than its factorization.

2121111100210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165837537.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2121111100210 its reverse (120011111212), we get a palindrome (2241122211422).

The spelling of 2121111100210 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, one hundred thousand, two hundred ten".