151631710121 has 2 divisors, whose sum is σ = 151631710122. Its totient is φ = 151631710120.

The previous prime is 151631710091. The next prime is 151631710129. The reversal of 151631710121 is 121017136151.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112748208400 + 38883501721 = 335780^2 + 197189^2 .

It is a cyclic number.

It is not a de Polignac number, because 151631710121 - 2⁶ = 151631710057 is a prime.

It is not a weakly prime, because it can be changed into another prime (151631710129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75815855060 + 75815855061.

It is an arithmetic number, because the mean of its divisors is an integer number (75815855061).

Almost surely, 2^151631710121 is an apocalyptic number.

It is an amenable number.

151631710121 is a deficient number, since it is larger than the sum of its proper divisors (1).

151631710121 is an equidigital number, since it uses as much as digits as its factorization.

151631710121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 29.

Adding to 151631710121 its reverse (121017136151), we get a palindrome (272648846272).

The spelling of 151631710121 in words is "one hundred fifty-one billion, six hundred thirty-one million, seven hundred ten thousand, one hundred twenty-one".