1221248902 has 8 divisors (see below), whose sum is σ = 1928287800. Its totient is φ = 578486304.

The previous prime is 1221248881. The next prime is 1221248911. The reversal of 1221248902 is 2098421221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16069027 + ... + 16069102.

It is an arithmetic number, because the mean of its divisors is an integer number (241035975).

Almost surely, 2^1221248902 is an apocalyptic number.

1221248902 is a deficient number, since it is larger than the sum of its proper divisors (707038898).

1221248902 is a wasteful number, since it uses less digits than its factorization.

1221248902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32138150.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1221248902 is about 34946.3718002313. The cubic root of 1221248902 is about 1068.8942202604.

The spelling of 1221248902 in words is "one billion, two hundred twenty-one million, two hundred forty-eight thousand, nine hundred two".