121312230121 has 16 divisors (see below), whose sum is σ = 128581770240. Its totient is φ = 114249582720.

The previous prime is 121312230119. The next prime is 121312230131. The reversal of 121312230121 is 121032213121.

It is a cyclic number.

It is not a de Polignac number, because 121312230121 - 2¹ = 121312230119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121312230131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11346040 + ... + 11356726.

It is an arithmetic number, because the mean of its divisors is an integer number (8036360640).

Almost surely, 2^121312230121 is an apocalyptic number.

It is an amenable number.

121312230121 is a deficient number, since it is larger than the sum of its proper divisors (7269540119).

121312230121 is a wasteful number, since it uses less digits than its factorization.

121312230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20304.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121312230121 its reverse (121032213121), we get a palindrome (242344443242).

The spelling of 121312230121 in words is "one hundred twenty-one billion, three hundred twelve million, two hundred thirty thousand, one hundred twenty-one".