212011102010221 has 8 divisors (see below), whose sum is σ = 212044205036664. Its totient is φ = 211978000926720.

The previous prime is 212011102010219. The next prime is 212011102010293. The reversal of 212011102010221 is 122010201110212.

It can be written as a sum of positive squares in 4 ways, for example, as 180168499454596 + 31842602555625 = 13422686^2 + 5642925^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 212011102010221 - 2¹ = 212011102010219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212011102010195 and 212011102010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011102016221) 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, 225952081 + ... + 226888441.

It is an arithmetic number, because the mean of its divisors is an integer number (26505525629583).

Almost surely, 2^{212011102010221} is an apocalyptic number.

It is an amenable number.

212011102010221 is a deficient number, since it is larger than the sum of its proper divisors (33103026443).

212011102010221 is an equidigital number, since it uses as much as digits as its factorization.

212011102010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971471.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212011102010221 its reverse (122010201110212), we get a palindrome (334021303120433).

Subtracting from 212011102010221 its reverse (122010201110212), we obtain a palindrome (90000900900009).

The spelling of 212011102010221 in words is "two hundred twelve trillion, eleven billion, one hundred two million, ten thousand, two hundred twenty-one".