1221000209974 has 16 divisors (see below), whose sum is σ = 1928064703680. Its totient is φ = 578317629960.

The previous prime is 1221000209959. The next prime is 1221000210011. The reversal of 1221000209974 is 4799020001221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974304 + ... + 1841539.

It is an arithmetic number, because the mean of its divisors is an integer number (120504043980).

Almost surely, 2^{1221000209974} is an apocalyptic number.

1221000209974 is a deficient number, since it is larger than the sum of its proper divisors (707064493706).

1221000209974 is a wasteful number, since it uses less digits than its factorization.

1221000209974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827275.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 1221000209974 in words is "one trillion, two hundred twenty-one billion, two hundred nine thousand, nine hundred seventy-four".