1221050542808 has 32 divisors (see below), whose sum is σ = 2348878640400. Its totient is φ = 594866055168.

The previous prime is 1221050542769. The next prime is 1221050542841. The reversal of 1221050542808 is 8082450501221.

It is a happy number.

It is a super-2 number, since 2×1221050542808² (a number of 25 digits) contains 22 as substring.

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, 11393441 + ... + 11500112.

Almost surely, 2^{1221050542808} is an apocalyptic number.

It is an amenable number.

1221050542808 is a deficient number, since it is larger than the sum of its proper divisors (1127828097592).

1221050542808 is a wasteful number, since it uses less digits than its factorization.

1221050542808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22893731 (or 22893727 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The spelling of 1221050542808 in words is "one trillion, two hundred twenty-one billion, fifty million, five hundred forty-two thousand, eight hundred eight".