1550100121 has 2 divisors, whose sum is σ = 1550100122. Its totient is φ = 1550100120.

The previous prime is 1550100107. The next prime is 1550100127. The reversal of 1550100121 is 1210010551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1533818896 + 16281225 = 39164^2 + 4035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550100121 - 2¹¹ = 1550098073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1550100095 and 1550100104.

It is not a weakly prime, because it can be changed into another prime (1550100127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775050060 + 775050061.

It is an arithmetic number, because the mean of its divisors is an integer number (775050061).

Almost surely, 2^1550100121 is an apocalyptic number.

It is an amenable number.

1550100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550100121 is an equidigital number, since it uses as much as digits as its factorization.

1550100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 1550100121 is about 39371.3108874978. The cubic root of 1550100121 is about 1157.3194448953.

Adding to 1550100121 its reverse (1210010551), we get a palindrome (2760110672).

The spelling of 1550100121 in words is "one billion, five hundred fifty million, one hundred thousand, one hundred twenty-one".