1121212221950 has 12 divisors (see below), whose sum is σ = 2085454732920. Its totient is φ = 448484888760.

The previous prime is 1121212221949. The next prime is 1121212222021. The reversal of 1121212221950 is 591222121211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11212122170 + ... + 11212122269.

It is an arithmetic number, because the mean of its divisors is an integer number (173787894410).

Almost surely, 2^{1121212221950} is an apocalyptic number.

1121212221950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121212221950 is a deficient number, since it is larger than the sum of its proper divisors (964242510970).

1121212221950 is a wasteful number, since it uses less digits than its factorization.

1121212221950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22424244451 (or 22424244446 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 29.

The spelling of 1121212221950 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, nine hundred fifty".