1221963048 has 48 divisors (see below), whose sum is σ = 3329333280. Its totient is φ = 404877984.

The previous prime is 1221963047. The next prime is 1221963049. The reversal of 1221963048 is 8403691221.

1221963048 is a `hidden beast` number, since 1 + 2 + 2 + 19 + 630 + 4 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1221963047) and next prime (1221963049).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1221963047) 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, 38790 + ... + 62837.

It is an arithmetic number, because the mean of its divisors is an integer number (69361110).

Almost surely, 2^1221963048 is an apocalyptic number.

1221963048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1221963048 is an abundant number, since it is smaller than the sum of its proper divisors (2107370232).

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

1221963048 is a wasteful number, since it uses less digits than its factorization.

1221963048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101806 (or 101799 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1221963048 is about 34956.5880486068. The cubic root of 1221963048 is about 1069.1025310002.

The spelling of 1221963048 in words is "one billion, two hundred twenty-one million, nine hundred sixty-three thousand, forty-eight".