501121051 has 2 divisors, whose sum is σ = 501121052. Its totient is φ = 501121050.

The previous prime is 501121031. The next prime is 501121141. The reversal of 501121051 is 150121105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501121051 - 2¹⁵ = 501088283 is a prime.

It is a super-2 number, since 2×501121051² = 502244615510689202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (501121031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250560525 + 250560526.

It is an arithmetic number, because the mean of its divisors is an integer number (250560526).

Almost surely, 2^501121051 is an apocalyptic number.

501121051 is a deficient number, since it is larger than the sum of its proper divisors (1).

501121051 is an equidigital number, since it uses as much as digits as its factorization.

501121051 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 501121051 is about 22385.7332021982. The cubic root of 501121051 is about 794.2932690533.

Adding to 501121051 its reverse (150121105), we get a palindrome (651242156).

It can be divided in two parts, 5011 and 21051, that added together give a palindrome (26062).

The spelling of 501121051 in words is "five hundred one million, one hundred twenty-one thousand, fifty-one".