1210212202221 has 48 divisors (see below), whose sum is σ = 1972953702720. Its totient is φ = 708100512000.

The previous prime is 1210212202219. The next prime is 1210212202223. The reversal of 1210212202221 is 1222022120121.

It is a happy number.

1210212202221 is a `hidden beast` number, since 1 + 210 + 212 + 20 + 2 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (1210212202219) and next prime (1210212202223).

It is not a de Polignac number, because 1210212202221 - 2¹ = 1210212202219 is a prime.

It is a super-2 number, since 2×1210212202221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210212202194 and 1210212202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210212202223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51353281 + ... + 51376841.

It is an arithmetic number, because the mean of its divisors is an integer number (41103202140).

Almost surely, 2^{1210212202221} is an apocalyptic number.

1210212202221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210212202221 is a deficient number, since it is larger than the sum of its proper divisors (762741500499).

1210212202221 is a wasteful number, since it uses less digits than its factorization.

1210212202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41498 (or 41495 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1210212202221 its reverse (1222022120121), we get a palindrome (2432234322342).

The spelling of 1210212202221 in words is "one trillion, two hundred ten billion, two hundred twelve million, two hundred two thousand, two hundred twenty-one".