121751630026 has 16 divisors (see below), whose sum is σ = 196700651784. Its totient is φ = 56185933824.

The previous prime is 121751630017. The next prime is 121751630069. The reversal of 121751630026 is 620036157121.

It can be written as a sum of positive squares in 4 ways, for example, as 44058429801 + 77693200225 = 209901^2 + 278735^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121751629973 and 121751630000.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 85111 + ... + 500746.

Almost surely, 2^121751630026 is an apocalyptic number.

121751630026 is a deficient number, since it is larger than the sum of its proper divisors (74949021758).

121751630026 is a wasteful number, since it uses less digits than its factorization.

121751630026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593865.

The product of its (nonzero) digits is 15120, while the sum is 34.

Adding to 121751630026 its reverse (620036157121), we get a palindrome (741787787147).

The spelling of 121751630026 in words is "one hundred twenty-one billion, seven hundred fifty-one million, six hundred thirty thousand, twenty-six".