1210221131 has 16 divisors (see below), whose sum is σ = 1456896000. Its totient is φ = 982067328.

The previous prime is 1210221119. The next prime is 1210221161. The reversal of 1210221131 is 1311220121.

It is a cyclic number.

It is not a de Polignac number, because 1210221131 - 2¹⁰ = 1210220107 is a prime.

It is a super-2 number, since 2×1210221131² = 2929270371837838322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1210221101) 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, 317171 + ... + 320963.

It is an arithmetic number, because the mean of its divisors is an integer number (91056000).

Almost surely, 2^1210221131 is an apocalyptic number.

1210221131 is a deficient number, since it is larger than the sum of its proper divisors (246674869).

1210221131 is a wasteful number, since it uses less digits than its factorization.

1210221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1210221131 is about 34788.2326512860. The cubic root of 1210221131 is about 1065.6671467763.

Adding to 1210221131 its reverse (1311220121), we get a palindrome (2521441252).

It can be divided in two parts, 12102 and 21131, that added together give a palindrome (33233).

The spelling of 1210221131 in words is "one billion, two hundred ten million, two hundred twenty-one thousand, one hundred thirty-one".