1212202221210 has 24 divisors (see below), whose sum is σ = 3151725775380. Its totient is φ = 323253925632.

The previous prime is 1212202221203. The next prime is 1212202221247. The reversal of 1212202221210 is 121222022121.

It is a happy number.

1212202221210 is a `hidden beast` number, since 1 + 212 + 20 + 2 + 221 + 210 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1093402744281 + 118799476929 = 1045659^2 + 344673^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6734456695 + ... + 6734456874.

Almost surely, 2^{1212202221210} is an apocalyptic number.

1212202221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212202221210 is an abundant number, since it is smaller than the sum of its proper divisors (1939523554170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212202221210 is a wasteful number, since it uses less digits than its factorization.

1212202221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13468913582 (or 13468913579 counting only the distinct ones).

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

Adding to 1212202221210 its reverse (121222022121), we get a palindrome (1333424243331).

The spelling of 1212202221210 in words is "one trillion, two hundred twelve billion, two hundred two million, two hundred twenty-one thousand, two hundred ten".