121010321505401 has 4 divisors (see below), whose sum is σ = 121032295420752. Its totient is φ = 120988347590052.

The previous prime is 121010321505343. The next prime is 121010321505457. The reversal of 121010321505401 is 104505123010121.

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 121010321505401 - 2²² = 121010317311097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121010321505901) 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, 10986949415 + ... + 10986960428.

It is an arithmetic number, because the mean of its divisors is an integer number (30258073855188).

Almost surely, 2^{121010321505401} is an apocalyptic number.

It is an amenable number.

121010321505401 is a deficient number, since it is larger than the sum of its proper divisors (21973915351).

121010321505401 is an equidigital number, since it uses as much as digits as its factorization.

121010321505401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21973915350.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 121010321505401 its reverse (104505123010121), we get a palindrome (225515444515522).

The spelling of 121010321505401 in words is "one hundred twenty-one trillion, ten billion, three hundred twenty-one million, five hundred five thousand, four hundred one".