15241121214421 has 2 divisors, whose sum is σ = 15241121214422. Its totient is φ = 15241121214420.

The previous prime is 15241121214373. The next prime is 15241121214439. The reversal of 15241121214421 is 12441212114251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14312307151921 + 928814062500 = 3783161^2 + 963750^2 .

It is a cyclic number.

It is not a de Polignac number, because 15241121214421 - 2²⁵ = 15241087659989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15241121214491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7620560607210 + 7620560607211.

It is an arithmetic number, because the mean of its divisors is an integer number (7620560607211).

Almost surely, 2^{15241121214421} is an apocalyptic number.

It is an amenable number.

15241121214421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15241121214421 is an equidigital number, since it uses as much as digits as its factorization.

15241121214421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5120, while the sum is 31.

Adding to 15241121214421 its reverse (12441212114251), we get a palindrome (27682333328672).

The spelling of 15241121214421 in words is "fifteen trillion, two hundred forty-one billion, one hundred twenty-one million, two hundred fourteen thousand, four hundred twenty-one".