1221222002202 has 80 divisors (see below), whose sum is σ = 2745939740544. Its totient is φ = 405663120000.

The previous prime is 1221222002153. The next prime is 1221222002233. The reversal of 1221222002202 is 2022002221221.

1221222002202 is a `hidden beast` number, since 1 + 221 + 2 + 220 + 0 + 220 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 70864927 + ... + 70882157.

Almost surely, 2^{1221222002202} is an apocalyptic number.

1221222002202 is an abundant number, since it is smaller than the sum of its proper divisors (1524717738342).

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

1221222002202 is a wasteful number, since it uses less digits than its factorization.

1221222002202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18737 (or 18728 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1221222002202 its reverse (2022002221221), we get a palindrome (3243224223423).

The spelling of 1221222002202 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, two thousand, two hundred two".