4212545021 has 2 divisors, whose sum is σ = 4212545022. Its totient is φ = 4212545020.

The previous prime is 4212544991. The next prime is 4212545027. The reversal of 4212545021 is 1205452124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2396592025 + 1815952996 = 48955^2 + 42614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4212545021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4212545027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2106272510 + 2106272511.

It is an arithmetic number, because the mean of its divisors is an integer number (2106272511).

Almost surely, 2^4212545021 is an apocalyptic number.

It is an amenable number.

4212545021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4212545021 is an equidigital number, since it uses as much as digits as its factorization.

4212545021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 4212545021 is about 64904.1217566342. The cubic root of 4212545021 is about 1615.0334378850.

Adding to 4212545021 its reverse (1205452124), we get a palindrome (5417997145).

The spelling of 4212545021 in words is "four billion, two hundred twelve million, five hundred forty-five thousand, twenty-one".