221001212202012 has 96 divisors (see below), whose sum is σ = 626097431232000. Its totient is φ = 66858260976000.

The previous prime is 221001212201941. The next prime is 221001212202037. The reversal of 221001212202012 is 210202212100122.

It is a happy number.

221001212202012 is a `hidden beast` number, since 22 + 100 + 121 + 220 + 201 + 2 = 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 pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154570489 + ... + 155993712.

It is an arithmetic number, because the mean of its divisors is an integer number (6521848242000).

Almost surely, 2^{221001212202012} is an apocalyptic number.

221001212202012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221001212202012 is an abundant number, since it is smaller than the sum of its proper divisors (405096219029988).

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

221001212202012 is a wasteful number, since it uses less digits than its factorization.

221001212202012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310564824 (or 310564816 counting only the distinct ones).

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

Adding to 221001212202012 its reverse (210202212100122), we get a palindrome (431203424302134).

The spelling of 221001212202012 in words is "two hundred twenty-one trillion, one billion, two hundred twelve million, two hundred two thousand, twelve".