1211110221223 has 36 divisors (see below), whose sum is σ = 1510322590920. Its totient is φ = 968065281792.

The previous prime is 1211110221107. The next prime is 1211110221229. The reversal of 1211110221223 is 3221220111121.

It is not a de Polignac number, because 1211110221223 - 2⁹ = 1211110220711 is a prime.

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 1211110221223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211110221229) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1151236 + ... + 1935862.

Almost surely, 2^{1211110221223} is an apocalyptic number.

1211110221223 is a deficient number, since it is larger than the sum of its proper divisors (299212369697).

1211110221223 is a wasteful number, since it uses less digits than its factorization.

1211110221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784784 (or 784760 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211110221223 its reverse (3221220111121), we get a palindrome (4432330332344).

The spelling of 1211110221223 in words is "one trillion, two hundred eleven billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty-three".