221021100000002 has 16 divisors (see below), whose sum is σ = 335794096368000. Its totient is φ = 109090283237520.

The previous prime is 221021099999993. The next prime is 221021100000011. The reversal of 221021100000002 is 200000001120122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221021099999993) and next prime (221021100000011).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136365149 + ... + 137976432.

It is an arithmetic number, because the mean of its divisors is an integer number (20987131023000).

Almost surely, 2^{221021100000002} is an apocalyptic number.

221021100000002 is a deficient number, since it is larger than the sum of its proper divisors (114772996367998).

221021100000002 is a wasteful number, since it uses less digits than its factorization.

221021100000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274346761.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221021100000002 its reverse (200000001120122), we get a palindrome (421021101120124).

The spelling of 221021100000002 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred million, two", and thus it is an aban number.