1212000100111 has 4 divisors (see below), whose sum is σ = 1230089653912. Its totient is φ = 1193910546312.

The previous prime is 1212000100099. The next prime is 1212000100133. The reversal of 1212000100111 is 1110010002121.

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 1212000100111 - 2²³ = 1211991711503 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 (1212000100151) 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, 9044776800 + ... + 9044776933.

It is an arithmetic number, because the mean of its divisors is an integer number (307522413478).

Almost surely, 2^{1212000100111} is an apocalyptic number.

1212000100111 is a deficient number, since it is larger than the sum of its proper divisors (18089553801).

1212000100111 is an equidigital number, since it uses as much as digits as its factorization.

1212000100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18089553800.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1212000100111 its reverse (1110010002121), we get a palindrome (2322010102232).

The spelling of 1212000100111 in words is "one trillion, two hundred twelve billion, one hundred thousand, one hundred eleven".