1221923950 has 48 divisors (see below), whose sum is σ = 2470623120. Its totient is φ = 446929920.

The previous prime is 1221923929. The next prime is 1221923959. The reversal of 1221923950 is 593291221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221923959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60766 + ... + 78334.

It is an arithmetic number, because the mean of its divisors is an integer number (51471315).

Almost surely, 2^1221923950 is an apocalyptic number.

1221923950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221923950 is an abundant number, since it is smaller than the sum of its proper divisors (1248699170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221923950 is a wasteful number, since it uses less digits than its factorization.

1221923950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17701 (or 17696 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1221923950 is about 34956.0288076320. The cubic root of 1221923950 is about 1069.0911285232.

The spelling of 1221923950 in words is "one billion, two hundred twenty-one million, nine hundred twenty-three thousand, nine hundred fifty".