212001121020111 has 32 divisors (see below), whose sum is σ = 291746770031808. Its totient is φ = 136847270338560.

The previous prime is 212001121020077. The next prime is 212001121020121. The reversal of 212001121020111 is 111020121100212.

It is a happy number.

It is not a de Polignac number, because 212001121020111 - 2¹⁷ = 212001120889039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001121020121) 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, 68123175 + ... + 71167191.

It is an arithmetic number, because the mean of its divisors is an integer number (9117086563494).

Almost surely, 2^{212001121020111} is an apocalyptic number.

212001121020111 is a deficient number, since it is larger than the sum of its proper divisors (79745649011697).

212001121020111 is a wasteful number, since it uses less digits than its factorization.

212001121020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048331.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212001121020111 its reverse (111020121100212), we get a palindrome (323021242120323).

The spelling of 212001121020111 in words is "two hundred twelve trillion, one billion, one hundred twenty-one million, twenty thousand, one hundred eleven".