1220211220210 has 32 divisors (see below), whose sum is σ = 2218368745584. Its totient is φ = 483199200000.

The previous prime is 1220211220201. The next prime is 1220211220213. The reversal of 1220211220210 is 120221120221.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1070713771009 + 149497449201 = 1034753^2 + 386649^2 .

It is a super-2 number, since 2×1220211220210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220211220213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9939000 + ... + 10061020.

Almost surely, 2^{1220211220210} is an apocalyptic number.

1220211220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220211220210 is a deficient number, since it is larger than the sum of its proper divisors (998157525374).

1220211220210 is a wasteful number, since it uses less digits than its factorization.

1220211220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132030.

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

Adding to 1220211220210 its reverse (120221120221), we get a palindrome (1340432340431).

The spelling of 1220211220210 in words is "one trillion, two hundred twenty billion, two hundred eleven million, two hundred twenty thousand, two hundred ten".