1222021131 has 16 divisors (see below), whose sum is σ = 1639228800. Its totient is φ = 809759808.

The previous prime is 1222021121. The next prime is 1222021133. The reversal of 1222021131 is 1311202221.

It is not a de Polignac number, because 1222021131 - 2⁶ = 1222021067 is a prime.

It is a super-2 number, since 2×1222021131² = 2986671289221038322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1222021131.

It is not an unprimeable number, because it can be changed into a prime (1222021133) 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, 583935 + ... + 586023.

It is an arithmetic number, because the mean of its divisors is an integer number (102451800).

Almost surely, 2^1222021131 is an apocalyptic number.

1222021131 is a deficient number, since it is larger than the sum of its proper divisors (417207669).

1222021131 is a wasteful number, since it uses less digits than its factorization.

1222021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1222021131 is about 34957.4188263379. The cubic root of 1222021131 is about 1069.1194697826.

Adding to 1222021131 its reverse (1311202221), we get a palindrome (2533223352).

The spelling of 1222021131 in words is "one billion, two hundred twenty-two million, twenty-one thousand, one hundred thirty-one".