1211219984 has 40 divisors (see below), whose sum is σ = 2529421440. Its totient is φ = 558546048.

The previous prime is 1211219983. The next prime is 1211219987. The reversal of 1211219984 is 4899121121.

It is not an unprimeable number, because it can be changed into a prime (1211219983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386777 + ... + 389895.

It is an arithmetic number, because the mean of its divisors is an integer number (63235536).

Almost surely, 2^1211219984 is an apocalyptic number.

It is an amenable number.

1211219984 is an abundant number, since it is smaller than the sum of its proper divisors (1318201456).

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

1211219984 is a wasteful number, since it uses less digits than its factorization.

1211219984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5007 (or 5001 counting only the distinct ones).

The product of its digits is 10368, while the sum is 38.

The square root of 1211219984 is about 34802.5858809371. The cubic root of 1211219984 is about 1065.9602480638.

The spelling of 1211219984 in words is "one billion, two hundred eleven million, two hundred nineteen thousand, nine hundred eighty-four".