1221001202212 has 48 divisors (see below), whose sum is σ = 2354057596800. Its totient is φ = 549513135360.

The previous prime is 1221001202189. The next prime is 1221001202233. The reversal of 1221001202212 is 2122021001221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28933864 + ... + 28976032.

It is an arithmetic number, because the mean of its divisors is an integer number (49042866600).

Almost surely, 2^{1221001202212} is an apocalyptic number.

It is an amenable number.

1221001202212 is a deficient number, since it is larger than the sum of its proper divisors (1133056394588).

1221001202212 is a wasteful number, since it uses less digits than its factorization.

1221001202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48676 (or 48674 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221001202212 its reverse (2122021001221), we get a palindrome (3343022203433).

The spelling of 1221001202212 in words is "one trillion, two hundred twenty-one billion, one million, two hundred two thousand, two hundred twelve".