1331202132121 has 2 divisors, whose sum is σ = 1331202132122. Its totient is φ = 1331202132120.

The previous prime is 1331202132101. The next prime is 1331202132131. The reversal of 1331202132121 is 1212312021331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1273692816400 + 57509315721 = 1128580^2 + 239811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331202132121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331202132092 and 1331202132101.

It is not a weakly prime, because it can be changed into another prime (1331202132101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665601066060 + 665601066061.

It is an arithmetic number, because the mean of its divisors is an integer number (665601066061).

Almost surely, 2^{1331202132121} is an apocalyptic number.

It is an amenable number.

1331202132121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331202132121 is an equidigital number, since it uses as much as digits as its factorization.

1331202132121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1331202132121 its reverse (1212312021331), we get a palindrome (2543514153452).

The spelling of 1331202132121 in words is "one trillion, three hundred thirty-one billion, two hundred two million, one hundred thirty-two thousand, one hundred twenty-one".