20142124401521 has 2 divisors, whose sum is σ = 20142124401522. Its totient is φ = 20142124401520.

The previous prime is 20142124401493. The next prime is 20142124401527. The reversal of 20142124401521 is 12510442124102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17887655184400 + 2254469217121 = 4229380^2 + 1501489^2 .

It is a cyclic number.

It is not a de Polignac number, because 20142124401521 - 2¹⁴ = 20142124385137 is a prime.

It is a super-2 number, since 2×20142124401521² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20142124401527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10071062200760 + 10071062200761.

It is an arithmetic number, because the mean of its divisors is an integer number (10071062200761).

Almost surely, 2^{20142124401521} is an apocalyptic number.

It is an amenable number.

20142124401521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20142124401521 is an equidigital number, since it uses as much as digits as its factorization.

20142124401521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 29.

Adding to 20142124401521 its reverse (12510442124102), we get a palindrome (32652566525623).

The spelling of 20142124401521 in words is "twenty trillion, one hundred forty-two billion, one hundred twenty-four million, four hundred one thousand, five hundred twenty-one".