121243320462251 has 32 divisors (see below), whose sum is σ = 135726430371840. Its totient is φ = 107548046784000.

The previous prime is 121243320462233. The next prime is 121243320462263. The reversal of 121243320462251 is 152264023342121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121243320462251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121243320462151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158383646 + ... + 159147308.

It is an arithmetic number, because the mean of its divisors is an integer number (4241450949120).

Almost surely, 2^{121243320462251} is an apocalyptic number.

121243320462251 is a deficient number, since it is larger than the sum of its proper divisors (14483109909589).

121243320462251 is a wasteful number, since it uses less digits than its factorization.

121243320462251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766467.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 121243320462251 in words is "one hundred twenty-one trillion, two hundred forty-three billion, three hundred twenty million, four hundred sixty-two thousand, two hundred fifty-one".