1221513932 has 6 divisors (see below), whose sum is σ = 2137649388. Its totient is φ = 610756964.

The previous prime is 1221513899. The next prime is 1221513941. The reversal of 1221513932 is 2393151221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221513895 and 1221513904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152689238 + ... + 152689245.

It is an arithmetic number, because the mean of its divisors is an integer number (356274898).

Almost surely, 2^1221513932 is an apocalyptic number.

It is an amenable number.

1221513932 is a deficient number, since it is larger than the sum of its proper divisors (916135456).

1221513932 is a wasteful number, since it uses less digits than its factorization.

1221513932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305378487 (or 305378485 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 1221513932 is about 34950.1635475429. The cubic root of 1221513932 is about 1068.9715368894.

The spelling of 1221513932 in words is "one billion, two hundred twenty-one million, five hundred thirteen thousand, nine hundred thirty-two".