1221204948 has 48 divisors (see below), whose sum is σ = 3004022784. Its totient is φ = 385549920.

The previous prime is 1221204947. The next prime is 1221204973. The reversal of 1221204948 is 8494021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221204947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17440 + ... + 52407.

It is an arithmetic number, because the mean of its divisors is an integer number (62583808).

Almost surely, 2^1221204948 is an apocalyptic number.

It is an amenable number.

1221204948 is an abundant number, since it is smaller than the sum of its proper divisors (1782817836).

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

1221204948 is a wasteful number, since it uses less digits than its factorization.

1221204948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69932 (or 69930 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1221204948 is about 34945.7429166987. The cubic root of 1221204948 is about 1068.8813965736.

The spelling of 1221204948 in words is "one billion, two hundred twenty-one million, two hundred four thousand, nine hundred forty-eight".