212222121010221 has 32 divisors (see below), whose sum is σ = 329662141159680. Its totient is φ = 118918686541824.

The previous prime is 212222121010189. The next prime is 212222121010259. The reversal of 212222121010221 is 122010121222212.

It is not a de Polignac number, because 212222121010221 - 2⁵ = 212222121010189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222121014221) 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, 48367570 + ... + 52572483.

It is an arithmetic number, because the mean of its divisors is an integer number (10301941911240).

Almost surely, 2^{212222121010221} is an apocalyptic number.

212222121010221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212222121010221 is a deficient number, since it is larger than the sum of its proper divisors (117440020149459).

212222121010221 is a wasteful number, since it uses less digits than its factorization.

212222121010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100942005.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212222121010221 its reverse (122010121222212), we get a palindrome (334232242232433).

The spelling of 212222121010221 in words is "two hundred twelve trillion, two hundred twenty-two billion, one hundred twenty-one million, ten thousand, two hundred twenty-one".