1212021100011 has 32 divisors (see below), whose sum is σ = 1640022912000. Its totient is φ = 796098844800.

The previous prime is 1212021100007. The next prime is 1212021100027. The reversal of 1212021100011 is 1100011202121.

It is not a de Polignac number, because 1212021100011 - 2² = 1212021100007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212021100011.

It is not an unprimeable number, because it can be changed into a prime (1212021100111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183664090 + ... + 183670688.

It is an arithmetic number, because the mean of its divisors is an integer number (51250716000).

Almost surely, 2^{1212021100011} is an apocalyptic number.

1212021100011 is a deficient number, since it is larger than the sum of its proper divisors (428001811989).

1212021100011 is a wasteful number, since it uses less digits than its factorization.

1212021100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9579.

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

Adding to 1212021100011 its reverse (1100011202121), we get a palindrome (2312032302132).

The spelling of 1212021100011 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred thousand, eleven".