1211200032131 has 4 divisors (see below), whose sum is σ = 1211204259600. Its totient is φ = 1211195804664.

The previous prime is 1211200032083. The next prime is 1211200032143. The reversal of 1211200032131 is 1312300021121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1211200032131 - 2²⁶ = 1211132923267 is a prime.

It is a super-2 number, since 2×1211200032131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211200032151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1650071 + ... + 2268288.

It is an arithmetic number, because the mean of its divisors is an integer number (302801064900).

Almost surely, 2^{1211200032131} is an apocalyptic number.

1211200032131 is a deficient number, since it is larger than the sum of its proper divisors (4227469).

1211200032131 is an equidigital number, since it uses as much as digits as its factorization.

1211200032131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227468.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1211200032131 its reverse (1312300021121), we get a palindrome (2523500053252).

The spelling of 1211200032131 in words is "one trillion, two hundred eleven billion, two hundred million, thirty-two thousand, one hundred thirty-one".