121002011211 has 4 divisors (see below), whose sum is σ = 161336014952. Its totient is φ = 80668007472.

The previous prime is 121002011197. The next prime is 121002011237. The reversal of 121002011211 is 112110200121.

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

It is not a de Polignac number, because 121002011211 - 2⁹ = 121002010699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121002011261) 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, 20167001866 + ... + 20167001871.

It is an arithmetic number, because the mean of its divisors is an integer number (40334003738).

Almost surely, 2^121002011211 is an apocalyptic number.

121002011211 is a deficient number, since it is larger than the sum of its proper divisors (40334003741).

121002011211 is an equidigital number, since it uses as much as digits as its factorization.

121002011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40334003740.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121002011211 its reverse (112110200121), we get a palindrome (233112211332).

The spelling of 121002011211 in words is "one hundred twenty-one billion, two million, eleven thousand, two hundred eleven".