1212100021011 has 16 divisors (see below), whose sum is σ = 1779229393920. Its totient is φ = 727866565920.

The previous prime is 1212100020991. The next prime is 1212100021043. The reversal of 1212100021011 is 1101200012121.

It is not a de Polignac number, because 1212100021011 - 2⁶ = 1212100020947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212100021081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168484035 + ... + 168491228.

It is an arithmetic number, because the mean of its divisors is an integer number (111201837120).

Almost surely, 2^{1212100021011} is an apocalyptic number.

1212100021011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212100021011 is a deficient number, since it is larger than the sum of its proper divisors (567129372909).

1212100021011 is a wasteful number, since it uses less digits than its factorization.

1212100021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336975386.

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

Adding to 1212100021011 its reverse (1101200012121), we get a palindrome (2313300033132).

The spelling of 1212100021011 in words is "one trillion, two hundred twelve billion, one hundred million, twenty-one thousand, eleven".