1210210012221 has 16 divisors (see below), whose sum is σ = 1860449276544. Its totient is φ = 685428678144.

The previous prime is 1210210012213. The next prime is 1210210012229. The reversal of 1210210012221 is 1222100120121.

It is an interprime number because it is at equal distance from previous prime (1210210012213) and next prime (1210210012229).

It is not a de Polignac number, because 1210210012221 - 2³ = 1210210012213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210210012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210210012229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254993416 + ... + 254998161.

It is an arithmetic number, because the mean of its divisors is an integer number (116278079784).

Almost surely, 2^{1210210012221} is an apocalyptic number.

It is an amenable number.

1210210012221 is a deficient number, since it is larger than the sum of its proper divisors (650239264323).

1210210012221 is a wasteful number, since it uses less digits than its factorization.

1210210012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509991700.

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

Adding to 1210210012221 its reverse (1222100120121), we get a palindrome (2432310132342).

The spelling of 1210210012221 in words is "one trillion, two hundred ten billion, two hundred ten million, twelve thousand, two hundred twenty-one".