212101011120021 has 8 divisors (see below), whose sum is σ = 282802423975680. Its totient is φ = 141400136172192.

The previous prime is 212101011120013. The next prime is 212101011120029. The reversal of 212101011120021 is 120021110101212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212101011120013) and next prime (212101011120029).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212101011120021 - 2³ = 212101011120013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101011120029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133556005 + ... + 135134778.

It is an arithmetic number, because the mean of its divisors is an integer number (35350302996960).

Almost surely, 2^{212101011120021} is an apocalyptic number.

It is an amenable number.

212101011120021 is a deficient number, since it is larger than the sum of its proper divisors (70701412855659).

212101011120021 is a wasteful number, since it uses less digits than its factorization.

212101011120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268953915.

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

Adding to 212101011120021 its reverse (120021110101212), we get a palindrome (332122121221233).

The spelling of 212101011120021 in words is "two hundred twelve trillion, one hundred one billion, eleven million, one hundred twenty thousand, twenty-one".