221212021202010 has 48 divisors (see below), whose sum is σ = 590695883651016. Its totient is φ = 57395551446144.

The previous prime is 221212021201979. The next prime is 221212021202059. The reversal of 221212021202010 is 10202120212122.

It is a happy number.

221212021202010 is a `hidden beast` number, since 22 + 121 + 202 + 120 + 201 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 211219221424689 + 9992799777321 = 14533383^2 + 3161139^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33215014869 + ... + 33215021528.

Almost surely, 2^{221212021202010} is an apocalyptic number.

221212021202010 is an abundant number, since it is smaller than the sum of its proper divisors (369483862449006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221212021202010 is a wasteful number, since it uses less digits than its factorization.

221212021202010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66430036447 (or 66430036444 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221212021202010 its reverse (10202120212122), we get a palindrome (231414141414132).

The spelling of 221212021202010 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty-one million, two hundred two thousand, ten".