1221851710150 has 24 divisors (see below), whose sum is σ = 2325496375224. Its totient is φ = 477374620800.

The previous prime is 1221851710099. The next prime is 1221851710169. The reversal of 1221851710150 is 510171581221.

It is a happy number.

It is a super-2 number, since 2×1221851710150² (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 11 ways as a sum of consecutive naturals, for example, 284149411 + ... + 284153710.

It is an arithmetic number, because the mean of its divisors is an integer number (96895682301).

Almost surely, 2^{1221851710150} is an apocalyptic number.

1221851710150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221851710150 is a deficient number, since it is larger than the sum of its proper divisors (1103644665074).

1221851710150 is a wasteful number, since it uses less digits than its factorization.

1221851710150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568303176 (or 568303171 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 34.

The spelling of 1221851710150 in words is "one trillion, two hundred twenty-one billion, eight hundred fifty-one million, seven hundred ten thousand, one hundred fifty".