4021213501 has 2 divisors, whose sum is σ = 4021213502. Its totient is φ = 4021213500.

The previous prime is 4021213429. The next prime is 4021213543. The reversal of 4021213501 is 1053121204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3358202500 + 663011001 = 57950^2 + 25749^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021213501 - 2²⁵ = 3987659069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021213591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010606750 + 2010606751.

It is an arithmetic number, because the mean of its divisors is an integer number (2010606751).

Almost surely, 2^4021213501 is an apocalyptic number.

It is an amenable number.

4021213501 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021213501 is an equidigital number, since it uses as much as digits as its factorization.

4021213501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 4021213501 is about 63413.0388879133. The cubic root of 4021213501 is about 1590.2023002489.

Adding to 4021213501 its reverse (1053121204), we get a palindrome (5074334705).

The spelling of 4021213501 in words is "four billion, twenty-one million, two hundred thirteen thousand, five hundred one".