2221121020210 has 32 divisors (see below), whose sum is σ = 4015829664000. Its totient is φ = 884492232960.

The previous prime is 2221121020193. The next prime is 2221121020211. The reversal of 2221121020210 is 120201211222.

It is a happy number.

It is a super-2 number, since 2×2221121020210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2221121020211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8865241 + ... + 9112339.

It is an arithmetic number, because the mean of its divisors is an integer number (125494677000).

Almost surely, 2^{2221121020210} is an apocalyptic number.

2221121020210 is a deficient number, since it is larger than the sum of its proper divisors (1794708643790).

2221121020210 is a wasteful number, since it uses less digits than its factorization.

2221121020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251106.

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

Adding to 2221121020210 its reverse (120201211222), we get a palindrome (2341322231432).

The spelling of 2221121020210 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty thousand, two hundred ten".