121140140205 has 32 divisors (see below), whose sum is σ = 221633685504. Its totient is φ = 55348278336.

The previous prime is 121140140189. The next prime is 121140140269. The reversal of 121140140205 is 502041041121.

It is not a de Polignac number, because 121140140205 - 2⁴ = 121140140189 is a prime.

It is a super-3 number, since 3×121140140205³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 118387 + ... + 506256.

It is an arithmetic number, because the mean of its divisors is an integer number (6926052672).

Almost surely, 2^121140140205 is an apocalyptic number.

121140140205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121140140205 is a deficient number, since it is larger than the sum of its proper divisors (100493545299).

121140140205 is a wasteful number, since it uses less digits than its factorization.

121140140205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626505.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 121140140205 its reverse (502041041121), we get a palindrome (623181181326).

The spelling of 121140140205 in words is "one hundred twenty-one billion, one hundred forty million, one hundred forty thousand, two hundred five".