121012001205 has 32 divisors (see below), whose sum is σ = 203909946240. Its totient is φ = 61112828160.

The previous prime is 121012001197. The next prime is 121012001213. The reversal of 121012001205 is 502100210121.

It is an interprime number because it is at equal distance from previous prime (121012001197) and next prime (121012001213).

It is not a de Polignac number, because 121012001205 - 2³ = 121012001197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 481695 + ... + 688515.

It is an arithmetic number, because the mean of its divisors is an integer number (6372185820).

Almost surely, 2^121012001205 is an apocalyptic number.

121012001205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121012001205 is a deficient number, since it is larger than the sum of its proper divisors (82897945035).

121012001205 is a wasteful number, since it uses less digits than its factorization.

121012001205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208901.

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

Adding to 121012001205 its reverse (502100210121), we get a palindrome (623112211326).

The spelling of 121012001205 in words is "one hundred twenty-one billion, twelve million, one thousand, two hundred five".