1210211222111 has 8 divisors (see below), whose sum is σ = 1249915910784. Its totient is φ = 1170548134560.

The previous prime is 1210211222107. The next prime is 1210211222113. The reversal of 1210211222111 is 1112221120121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210211222111 - 2² = 1210211222107 is a prime.

It is a super-2 number, since 2×1210211222111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210211222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210211222113) 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, 10341140 + ... + 10457513.

It is an arithmetic number, because the mean of its divisors is an integer number (156239488848).

Almost surely, 2^{1210211222111} is an apocalyptic number.

1210211222111 is a deficient number, since it is larger than the sum of its proper divisors (39704688673).

1210211222111 is a wasteful number, since it uses less digits than its factorization.

1210211222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20800561.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1210211222111 its reverse (1112221120121), we get a palindrome (2322432342232).

The spelling of 1210211222111 in words is "one trillion, two hundred ten billion, two hundred eleven million, two hundred twenty-two thousand, one hundred eleven".