49201021 has 2 divisors, whose sum is σ = 49201022. Its totient is φ = 49201020.

The previous prime is 49201001. The next prime is 49201037. The reversal of 49201021 is 12010294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42120100 + 7080921 = 6490^2 + 2661^2 .

It is a cyclic number.

It is not a de Polignac number, because 49201021 - 2⁹ = 49200509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49201021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49201001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24600510 + 24600511.

It is an arithmetic number, because the mean of its divisors is an integer number (24600511).

Almost surely, 2^49201021 is an apocalyptic number.

It is an amenable number.

49201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

49201021 is an equidigital number, since it uses as much as digits as its factorization.

49201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 49201021 is about 7014.3439465142. The cubic root of 49201021 is about 366.4302945790.

The spelling of 49201021 in words is "forty-nine million, two hundred one thousand, twenty-one".