1211401202131 has 4 divisors (see below), whose sum is σ = 1282660096392. Its totient is φ = 1140142307872.

The previous prime is 1211401202129. The next prime is 1211401202213. The reversal of 1211401202131 is 1312021041121.

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 1211401202131 - 2¹ = 1211401202129 is a prime.

It is a super-3 number, since 3×1211401202131³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211401202099 and 1211401202108.

It is not an unprimeable number, because it can be changed into a prime (1211401202111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35629447105 + ... + 35629447138.

It is an arithmetic number, because the mean of its divisors is an integer number (320665024098).

Almost surely, 2^{1211401202131} is an apocalyptic number.

1211401202131 is a deficient number, since it is larger than the sum of its proper divisors (71258894261).

1211401202131 is an equidigital number, since it uses as much as digits as its factorization.

1211401202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71258894260.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211401202131 its reverse (1312021041121), we get a palindrome (2523422243252).

The spelling of 1211401202131 in words is "one trillion, two hundred eleven billion, four hundred one million, two hundred two thousand, one hundred thirty-one".