1221200142212 has 24 divisors (see below), whose sum is σ = 2145785427072. Its totient is φ = 608118980000.

The previous prime is 1221200142209. The next prime is 1221200142251. The reversal of 1221200142212 is 2122410021221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14849318 + ... + 14931330.

It is an arithmetic number, because the mean of its divisors is an integer number (89407726128).

Almost surely, 2^{1221200142212} is an apocalyptic number.

It is an amenable number.

1221200142212 is a deficient number, since it is larger than the sum of its proper divisors (924585284860).

1221200142212 is a wasteful number, since it uses less digits than its factorization.

1221200142212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97099 (or 97097 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1221200142212 its reverse (2122410021221), we get a palindrome (3343610163433).

The spelling of 1221200142212 in words is "one trillion, two hundred twenty-one billion, two hundred million, one hundred forty-two thousand, two hundred twelve".