3520150021 has 2 divisors, whose sum is σ = 3520150022. Its totient is φ = 3520150020.

The previous prime is 3520150001. The next prime is 3520150031. The reversal of 3520150021 is 1200510253.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3391781121 + 128368900 = 58239^2 + 11330^2 .

It is a cyclic number.

It is not a de Polignac number, because 3520150021 - 2⁵ = 3520149989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3520150001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760075010 + 1760075011.

It is an arithmetic number, because the mean of its divisors is an integer number (1760075011).

Almost surely, 2^3520150021 is an apocalyptic number.

It is an amenable number.

3520150021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3520150021 is an equidigital number, since it uses as much as digits as its factorization.

3520150021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 3520150021 is about 59330.8521850142. The cubic root of 3520150021 is about 1521.2025947071.

Adding to 3520150021 its reverse (1200510253), we get a palindrome (4720660274).

The spelling of 3520150021 in words is "three billion, five hundred twenty million, one hundred fifty thousand, twenty-one".