1210011000221 has 8 divisors (see below), whose sum is σ = 1251796663800. Its totient is φ = 1168229413120.

The previous prime is 1210011000073. The next prime is 1210011000227. The reversal of 1210011000221 is 1220001100121.

It can be written as a sum of positive squares in 4 ways, for example, as 196 + 1210011000025 = 14^2 + 1100005^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210011000221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210011000227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409016 + ... + 1608513.

It is an arithmetic number, because the mean of its divisors is an integer number (156474582975).

Almost surely, 2^{1210011000221} is an apocalyptic number.

It is an amenable number.

1210011000221 is a deficient number, since it is larger than the sum of its proper divisors (41785663579).

1210011000221 is a wasteful number, since it uses less digits than its factorization.

1210011000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038239.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1210011000221 its reverse (1220001100121), we get a palindrome (2430012100342).

The spelling of 1210011000221 in words is "one trillion, two hundred ten billion, eleven million, two hundred twenty-one", and thus it is an aban number.