121212002111 has 4 divisors (see below), whose sum is σ = 121213370832. Its totient is φ = 121210633392.

The previous prime is 121212002099. The next prime is 121212002113. The reversal of 121212002111 is 111200212121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212002111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212002113) 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, 541595 + ... + 731948.

It is an arithmetic number, because the mean of its divisors is an integer number (30303342708).

Almost surely, 2^121212002111 is an apocalyptic number.

121212002111 is a deficient number, since it is larger than the sum of its proper divisors (1368721).

121212002111 is an equidigital number, since it uses as much as digits as its factorization.

121212002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368720.

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

Adding to 121212002111 its reverse (111200212121), we get a palindrome (232412214232).

The spelling of 121212002111 in words is "one hundred twenty-one billion, two hundred twelve million, two thousand, one hundred eleven".