31332021121 has 2 divisors, whose sum is σ = 31332021122. Its totient is φ = 31332021120.

The previous prime is 31332021107. The next prime is 31332021233. The reversal of 31332021121 is 12112023313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17244942400 + 14087078721 = 131320^2 + 118689^2 .

It is a cyclic number.

It is not a de Polignac number, because 31332021121 - 2¹⁵ = 31331988353 is a prime.

It is not a weakly prime, because it can be changed into another prime (31332024121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15666010560 + 15666010561.

It is an arithmetic number, because the mean of its divisors is an integer number (15666010561).

Almost surely, 2^31332021121 is an apocalyptic number.

It is an amenable number.

31332021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31332021121 is an equidigital number, since it uses as much as digits as its factorization.

31332021121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31332021121 its reverse (12112023313), we get a palindrome (43444044434).

The spelling of 31332021121 in words is "thirty-one billion, three hundred thirty-two million, twenty-one thousand, one hundred twenty-one".