1212110102221 has 32 divisors (see below), whose sum is σ = 1313283456000. Its totient is φ = 1115951020800.

The previous prime is 1212110102219. The next prime is 1212110102263. The reversal of 1212110102221 is 1222010112121.

It is not a de Polignac number, because 1212110102221 - 2¹ = 1212110102219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212110102195 and 1212110102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212110102521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16230715 + ... + 16305223.

It is an arithmetic number, because the mean of its divisors is an integer number (41040108000).

Almost surely, 2^{1212110102221} is an apocalyptic number.

It is an amenable number.

1212110102221 is a deficient number, since it is larger than the sum of its proper divisors (101173353779).

1212110102221 is a wasteful number, since it uses less digits than its factorization.

1212110102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74829.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212110102221 its reverse (1222010112121), we get a palindrome (2434120214342).

The spelling of 1212110102221 in words is "one trillion, two hundred twelve billion, one hundred ten million, one hundred two thousand, two hundred twenty-one".