1131420121 has 8 divisors (see below), whose sum is σ = 1219091720. Its totient is φ = 1043839872.

The previous prime is 1131420119. The next prime is 1131420137. The reversal of 1131420121 is 1210241311.

It can be written as a sum of positive squares in 4 ways, for example, as 87160896 + 1044259225 = 9336^2 + 32315^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1131420121 - 2¹ = 1131420119 is a prime.

It is a super-2 number, since 2×1131420121² = 2560222980407309282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131420095 and 1131420104.

It is not an unprimeable number, because it can be changed into a prime (1131420161) 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, 4075 + ... + 47743.

It is an arithmetic number, because the mean of its divisors is an integer number (152386465).

Almost surely, 2^1131420121 is an apocalyptic number.

It is an amenable number.

1131420121 is a deficient number, since it is larger than the sum of its proper divisors (87671599).

1131420121 is a wasteful number, since it uses less digits than its factorization.

1131420121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45675.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1131420121 is about 33636.5890214808. The cubic root of 1131420121 is about 1042.0165880553.

Adding to 1131420121 its reverse (1210241311), we get a palindrome (2341661432).

The spelling of 1131420121 in words is "one billion, one hundred thirty-one million, four hundred twenty thousand, one hundred twenty-one".