1221500673350 has 24 divisors (see below), whose sum is σ = 2327405677128. Its totient is φ = 476683188800.

The previous prime is 1221500673319. The next prime is 1221500673353. The reversal of 1221500673350 is 533760051221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221500673350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221500673353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297924944 + ... + 297929043.

It is an arithmetic number, because the mean of its divisors is an integer number (96975236547).

Almost surely, 2^{1221500673350} is an apocalyptic number.

1221500673350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221500673350 is a deficient number, since it is larger than the sum of its proper divisors (1105905003778).

1221500673350 is a wasteful number, since it uses less digits than its factorization.

1221500673350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595854040 (or 595854035 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 1221500673350 in words is "one trillion, two hundred twenty-one billion, five hundred million, six hundred seventy-three thousand, three hundred fifty".