1210221220101 has 16 divisors (see below), whose sum is σ = 1621262254080. Its totient is φ = 802998943920.

The previous prime is 1210221220099. The next prime is 1210221220133. The reversal of 1210221220101 is 1010221220121.

It is not a de Polignac number, because 1210221220101 - 2¹ = 1210221220099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210221220141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2530240 + ... + 2970278.

It is an arithmetic number, because the mean of its divisors is an integer number (101328890880).

Almost surely, 2^{1210221220101} is an apocalyptic number.

It is an amenable number.

1210221220101 is a deficient number, since it is larger than the sum of its proper divisors (411041033979).

1210221220101 is a wasteful number, since it uses less digits than its factorization.

1210221220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444376.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1210221220101 its reverse (1010221220121), we get a palindrome (2220442440222).

The spelling of 1210221220101 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, two hundred twenty thousand, one hundred one".