121521651341 has 4 divisors (see below), whose sum is σ = 121579993152. Its totient is φ = 121463309532.

The previous prime is 121521651337. The next prime is 121521651347. The reversal of 121521651341 is 143156125121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121521651341 - 2² = 121521651337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121521651298 and 121521651307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121521651347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29167781 + ... + 29171946.

It is an arithmetic number, because the mean of its divisors is an integer number (30394998288).

Almost surely, 2^121521651341 is an apocalyptic number.

It is an amenable number.

121521651341 is a deficient number, since it is larger than the sum of its proper divisors (58341811).

121521651341 is an equidigital number, since it uses as much as digits as its factorization.

121521651341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58341810.

The product of its digits is 7200, while the sum is 32.

Adding to 121521651341 its reverse (143156125121), we get a palindrome (264677776462).

The spelling of 121521651341 in words is "one hundred twenty-one billion, five hundred twenty-one million, six hundred fifty-one thousand, three hundred forty-one".