1210001212222 has 16 divisors (see below), whose sum is σ = 1999605967344. Its totient is φ = 544555000000.

The previous prime is 1210001212219. The next prime is 1210001212223. The reversal of 1210001212222 is 2222121000121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1210001212196 and 1210001212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210001212223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272275279 + ... + 272279722.

It is an arithmetic number, because the mean of its divisors is an integer number (124975372959).

Almost surely, 2^{1210001212222} is an apocalyptic number.

1210001212222 is a deficient number, since it is larger than the sum of its proper divisors (789604755122).

1210001212222 is a wasteful number, since it uses less digits than its factorization.

1210001212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544555115.

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

Adding to 1210001212222 its reverse (2222121000121), we get a palindrome (3432122212343).

It can be divided in two parts, 121000121 and 2222, that multiplied together give a palindrome (268862268862).

The spelling of 1210001212222 in words is "one trillion, two hundred ten billion, one million, two hundred twelve thousand, two hundred twenty-two".