53020212521 has 2 divisors, whose sum is σ = 53020212522. Its totient is φ = 53020212520.

The previous prime is 53020212461. The next prime is 53020212607. The reversal of 53020212521 is 12521202035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40146133225 + 12874079296 = 200365^2 + 113464^2 .

It is a cyclic number.

It is not a de Polignac number, because 53020212521 - 2¹⁸ = 53019950377 is a prime.

It is a super-2 number, since 2×53020212521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53020212821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26510106260 + 26510106261.

It is an arithmetic number, because the mean of its divisors is an integer number (26510106261).

Almost surely, 2^53020212521 is an apocalyptic number.

It is an amenable number.

53020212521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53020212521 is an equidigital number, since it uses as much as digits as its factorization.

53020212521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 53020212521 its reverse (12521202035), we get a palindrome (65541414556).

The spelling of 53020212521 in words is "fifty-three billion, twenty million, two hundred twelve thousand, five hundred twenty-one".