12121030011211 has 4 divisors (see below), whose sum is σ = 13222941830424. Its totient is φ = 11019118192000.

The previous prime is 12121030011173. The next prime is 12121030011241. The reversal of 12121030011211 is 11211003012121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12121030011211 - 2¹¹ = 12121030009163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121030011241) 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, 550955909590 + ... + 550955909611.

It is an arithmetic number, because the mean of its divisors is an integer number (3305735457606).

Almost surely, 2^{12121030011211} is an apocalyptic number.

12121030011211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12121030011211 is a deficient number, since it is larger than the sum of its proper divisors (1101911819213).

12121030011211 is a wasteful number, since it uses less digits than its factorization.

12121030011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101911819212.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 12121030011211 its reverse (11211003012121), we get a palindrome (23332033023332).

The spelling of 12121030011211 in words is "twelve trillion, one hundred twenty-one billion, thirty million, eleven thousand, two hundred eleven".