1221000202204 has 6 divisors (see below), whose sum is σ = 2136750353864. Its totient is φ = 610500101100.

The previous prime is 1221000202189. The next prime is 1221000202211. The reversal of 1221000202204 is 4022020001221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152625025272 + ... + 152625025279.

Almost surely, 2^{1221000202204} is an apocalyptic number.

It is an amenable number.

1221000202204 is a deficient number, since it is larger than the sum of its proper divisors (915750151660).

1221000202204 is a wasteful number, since it uses less digits than its factorization.

1221000202204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305250050555 (or 305250050553 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1221000202204 its reverse (4022020001221), we get a palindrome (5243020203425).

The spelling of 1221000202204 in words is "one trillion, two hundred twenty-one billion, two hundred two thousand, two hundred four".