1121201212131 has 240 divisors, whose sum is σ = 2247974047488. Its totient is φ = 522766483200.

The previous prime is 1121201212091. The next prime is 1121201212237. The reversal of 1121201212131 is 1312121021211.

It is a happy number.

1121201212131 is a `hidden beast` number, since 1 + 121 + 201 + 212 + 131 = 666.

It is not a de Polignac number, because 1121201212131 - 2¹⁵ = 1121201179363 is a prime.

It is a super-2 number, since 2×1121201212131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121201212631) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 732331836 + ... + 732333366.

Almost surely, 2^{1121201212131} is an apocalyptic number.

1121201212131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121201212131 is an abundant number, since it is smaller than the sum of its proper divisors (1126772835357).

1121201212131 is a wasteful number, since it uses less digits than its factorization.

1121201212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1121201212131 its reverse (1312121021211), we get a palindrome (2433322233342).

The spelling of 1121201212131 in words is "one trillion, one hundred twenty-one billion, two hundred one million, two hundred twelve thousand, one hundred thirty-one".