1211302031223 has 16 divisors (see below), whose sum is σ = 1618176754656. Its totient is φ = 805981224960.

The previous prime is 1211302031213. The next prime is 1211302031239. The reversal of 1211302031223 is 3221302031121.

It is not a de Polignac number, because 1211302031223 - 2⁹ = 1211302030711 is a prime.

It is a super-2 number, since 2×1211302031223² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211302031223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211302031213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34677415 + ... + 34712327.

It is an arithmetic number, because the mean of its divisors is an integer number (101136047166).

Almost surely, 2^{1211302031223} is an apocalyptic number.

1211302031223 is a deficient number, since it is larger than the sum of its proper divisors (406874723433).

1211302031223 is a wasteful number, since it uses less digits than its factorization.

1211302031223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56834.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1211302031223 its reverse (3221302031121), we get a palindrome (4432604062344).

The spelling of 1211302031223 in words is "one trillion, two hundred eleven billion, three hundred two million, thirty-one thousand, two hundred twenty-three".