1242211131 has 24 divisors (see below), whose sum is σ = 2171261664. Its totient is φ = 668079360.

The previous prime is 1242211129. The next prime is 1242211171. The reversal of 1242211131 is 1311122421.

It is not a de Polignac number, because 1242211131 - 2¹ = 1242211129 is a prime.

It is a super-2 number, since 2×1242211131² = 3086176987960598322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242211121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 578860 + ... + 581001.

It is an arithmetic number, because the mean of its divisors is an integer number (90469236).

Almost surely, 2^1242211131 is an apocalyptic number.

1242211131 is a deficient number, since it is larger than the sum of its proper divisors (929050533).

1242211131 is a wasteful number, since it uses less digits than its factorization.

1242211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159891 (or 1159888 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1242211131 is about 35245.0156901653. The cubic root of 1242211131 is about 1074.9752670711.

Adding to 1242211131 its reverse (1311122421), we get a palindrome (2553333552).

The spelling of 1242211131 in words is "one billion, two hundred forty-two million, two hundred eleven thousand, one hundred thirty-one".