212001101100021 has 16 divisors (see below), whose sum is σ = 282926267948480. Its totient is φ = 141205006546560.

The previous prime is 212001101099959. The next prime is 212001101100023. The reversal of 212001101100021 is 120001101100212.

It is not a de Polignac number, because 212001101100021 - 2⁹ = 212001101099509 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 (212001101100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152533695 + ... + 153917283.

It is an arithmetic number, because the mean of its divisors is an integer number (17682891746780).

Almost surely, 2^{212001101100021} is an apocalyptic number.

It is an amenable number.

212001101100021 is a deficient number, since it is larger than the sum of its proper divisors (70925166848459).

212001101100021 is a wasteful number, since it uses less digits than its factorization.

212001101100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430196.

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

Adding to 212001101100021 its reverse (120001101100212), we get a palindrome (332002202200233).

The spelling of 212001101100021 in words is "two hundred twelve trillion, one billion, one hundred one million, one hundred thousand, twenty-one".