121010201009 has 4 divisors (see below), whose sum is σ = 121010963316. Its totient is φ = 121009438704.

The previous prime is 121010200951. The next prime is 121010201017. The reversal of 121010201009 is 900102010121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 80956182784 + 40054018225 = 284528^2 + 200135^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010201009 - 2¹² = 121010196913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121010201029) 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, 43094 + ... + 493839.

It is an arithmetic number, because the mean of its divisors is an integer number (30252740829).

Almost surely, 2^121010201009 is an apocalyptic number.

It is an amenable number.

121010201009 is a deficient number, since it is larger than the sum of its proper divisors (762307).

121010201009 is an equidigital number, since it uses as much as digits as its factorization.

121010201009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762306.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 121010201009 in words is "one hundred twenty-one billion, ten million, two hundred one thousand, nine".