121012120211 has 4 divisors (see below), whose sum is σ = 124915737024. Its totient is φ = 117108503400.

The previous prime is 121012120181. The next prime is 121012120223. The reversal of 121012120211 is 112021210121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112021210121 = 29 ⋅3862800349.

It is a cyclic number.

It is not a de Polignac number, because 121012120211 - 2¹⁴ = 121012103827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121012120231) 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, 1951808360 + ... + 1951808421.

It is an arithmetic number, because the mean of its divisors is an integer number (31228934256).

Almost surely, 2^121012120211 is an apocalyptic number.

121012120211 is a deficient number, since it is larger than the sum of its proper divisors (3903616813).

121012120211 is an equidigital number, since it uses as much as digits as its factorization.

121012120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903616812.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121012120211 its reverse (112021210121), we get a palindrome (233033330332).

It can be divided in two parts, 12101 and 2120211, that added together give a palindrome (2132312).

The spelling of 121012120211 in words is "one hundred twenty-one billion, twelve million, one hundred twenty thousand, two hundred eleven".