1211220022210 has 32 divisors (see below), whose sum is σ = 2379255835392. Its totient is φ = 440284356480.

The previous prime is 1211220022163. The next prime is 1211220022211. The reversal of 1211220022210 is 122200221121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1211220022211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1685347 + ... + 2294086.

It is an arithmetic number, because the mean of its divisors is an integer number (74351744856).

Almost surely, 2^{1211220022210} is an apocalyptic number.

1211220022210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211220022210 is a deficient number, since it is larger than the sum of its proper divisors (1168035813182).

1211220022210 is a wasteful number, since it uses less digits than its factorization.

1211220022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3982218.

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

Adding to 1211220022210 its reverse (122200221121), we get a palindrome (1333420243331).

The spelling of 1211220022210 in words is "one trillion, two hundred eleven billion, two hundred twenty million, twenty-two thousand, two hundred ten".