721124051 has 2 divisors, whose sum is σ = 721124052. Its totient is φ = 721124050.

The previous prime is 721124029. The next prime is 721124057. The reversal of 721124051 is 150421127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721124051 - 2⁶ = 721123987 is a prime.

It is not a weakly prime, because it can be changed into another prime (721124057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360562025 + 360562026.

It is an arithmetic number, because the mean of its divisors is an integer number (360562026).

Almost surely, 2^721124051 is an apocalyptic number.

721124051 is a deficient number, since it is larger than the sum of its proper divisors (1).

721124051 is an equidigital number, since it uses as much as digits as its factorization.

721124051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 721124051 is about 26853.7530151746. The cubic root of 721124051 is about 896.7471260117.

Adding to 721124051 its reverse (150421127), we get a palindrome (871545178).

The spelling of 721124051 in words is "seven hundred twenty-one million, one hundred twenty-four thousand, fifty-one".