121001210205 has 8 divisors (see below), whose sum is σ = 193601936352. Its totient is φ = 64533978768.

The previous prime is 121001210203. The next prime is 121001210227. The reversal of 121001210205 is 502012100121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121001210205 - 2¹ = 121001210203 is a prime.

It is a super-2 number, since 2×121001210205² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 8066747347 = 121001210205 / (1 + 2 + 1 + 0 + 0 + 1 + 2 + 1 + 0 + 2 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001210203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4033373659 + ... + 4033373688.

It is an arithmetic number, because the mean of its divisors is an integer number (24200242044).

Almost surely, 2^121001210205 is an apocalyptic number.

121001210205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121001210205 is a deficient number, since it is larger than the sum of its proper divisors (72600726147).

121001210205 is an equidigital number, since it uses as much as digits as its factorization.

121001210205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8066747355.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 121001210205 its reverse (502012100121), we get a palindrome (623013310326).

The spelling of 121001210205 in words is "one hundred twenty-one billion, one million, two hundred ten thousand, two hundred five".