1211223230031 has 16 divisors (see below), whose sum is σ = 1641044782944. Its totient is φ = 794538153984.

The previous prime is 1211223230029. The next prime is 1211223230047. The reversal of 1211223230031 is 1300323221121.

It is not a de Polignac number, because 1211223230031 - 2¹ = 1211223230029 is a prime.

It is a super-2 number, since 2×1211223230031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211223230011) 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, 11979366 + ... + 12080051.

It is an arithmetic number, because the mean of its divisors is an integer number (102565298934).

Almost surely, 2^{1211223230031} is an apocalyptic number.

1211223230031 is a deficient number, since it is larger than the sum of its proper divisors (429821552913).

1211223230031 is a wasteful number, since it uses less digits than its factorization.

1211223230031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24059690.

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

Adding to 1211223230031 its reverse (1300323221121), we get a palindrome (2511546451152).

The spelling of 1211223230031 in words is "one trillion, two hundred eleven billion, two hundred twenty-three million, two hundred thirty thousand, thirty-one".