1021122131 has 4 divisors (see below), whose sum is σ = 1021208352. Its totient is φ = 1021035912.

The previous prime is 1021122107. The next prime is 1021122173. The reversal of 1021122131 is 1312211201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1312211201 = 7 ⋅187458743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021122131 is a prime.

It is a super-2 number, since 2×1021122131² = 2085380812835962322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021122101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21851 + ... + 50196.

It is an arithmetic number, because the mean of its divisors is an integer number (255302088).

Almost surely, 2^1021122131 is an apocalyptic number.

1021122131 is a deficient number, since it is larger than the sum of its proper divisors (86221).

1021122131 is an equidigital number, since it uses as much as digits as its factorization.

1021122131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86220.

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

The square root of 1021122131 is about 31955.0016585823. The cubic root of 1021122131 is about 1006.9917123638.

Adding to 1021122131 its reverse (1312211201), we get a palindrome (2333333332).

The spelling of 1021122131 in words is "one billion, twenty-one million, one hundred twenty-two thousand, one hundred thirty-one".