221020212210012 has 96 divisors (see below), whose sum is σ = 588239345433600. Its totient is φ = 71732278895616.

The previous prime is 221020212209977. The next prime is 221020212210023. The reversal of 221020212210012 is 210012212020122.

It is a happy number.

221020212210012 is a `hidden beast` number, since 2 + 210 + 20 + 212 + 210 + 0 + 12 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111823962 + ... + 113783297.

It is an arithmetic number, because the mean of its divisors is an integer number (6127493181600).

Almost surely, 2^{221020212210012} is an apocalyptic number.

It is an amenable number.

221020212210012 is an abundant number, since it is smaller than the sum of its proper divisors (367219133223588).

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

221020212210012 is a wasteful number, since it uses less digits than its factorization.

221020212210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225607512 (or 225607504 counting only the distinct ones).

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

Adding to 221020212210012 its reverse (210012212020122), we get a palindrome (431032424230134).

The spelling of 221020212210012 in words is "two hundred twenty-one trillion, twenty billion, two hundred twelve million, two hundred ten thousand, twelve".