2131543204061 has 2 divisors, whose sum is σ = 2131543204062. Its totient is φ = 2131543204060.

The previous prime is 2131543204031. The next prime is 2131543204067. The reversal of 2131543204061 is 1604023451312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2000838540100 + 130704663961 = 1414510^2 + 361531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131543204061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131543204067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065771602030 + 1065771602031.

It is an arithmetic number, because the mean of its divisors is an integer number (1065771602031).

Almost surely, 2^{2131543204061} is an apocalyptic number.

It is an amenable number.

2131543204061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131543204061 is an equidigital number, since it uses as much as digits as its factorization.

2131543204061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 2131543204061 its reverse (1604023451312), we get a palindrome (3735566655373).

The spelling of 2131543204061 in words is "two trillion, one hundred thirty-one billion, five hundred forty-three million, two hundred four thousand, sixty-one".