1121220131 has 8 divisors (see below), whose sum is σ = 1140622560. Its totient is φ = 1101969088.

The previous prime is 1121220103. The next prime is 1121220157. The reversal of 1121220131 is 1310221211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121220131 is a prime.

It is a super-2 number, since 2×1121220131² = 2514269164319314322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121220101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22856 + ... + 52581.

It is an arithmetic number, because the mean of its divisors is an integer number (142577820).

Almost surely, 2^1121220131 is an apocalyptic number.

1121220131 is a deficient number, since it is larger than the sum of its proper divisors (19402429).

1121220131 is an equidigital number, since it uses as much as digits as its factorization.

1121220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75693.

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

The square root of 1121220131 is about 33484.6252928116. The cubic root of 1121220131 is about 1038.8757979754.

Adding to 1121220131 its reverse (1310221211), we get a palindrome (2431441342).

The spelling of 1121220131 in words is "one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred thirty-one".