1005212216650 has 24 divisors (see below), whose sum is σ = 1883342142540. Its totient is φ = 399149957760.

The previous prime is 1005212216611. The next prime is 1005212216677. The reversal of 1005212216650 is 566122125001.

It can be written as a sum of positive squares in 6 ways, for example, as 134586993321 + 870625223329 = 366861^2 + 933073^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73366305 + ... + 73380004.

Almost surely, 2^{1005212216650} is an apocalyptic number.

1005212216650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1005212216650 is a deficient number, since it is larger than the sum of its proper divisors (878129925890).

1005212216650 is a wasteful number, since it uses less digits than its factorization.

1005212216650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146746458 (or 146746453 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 1005212216650 in words is "one trillion, five billion, two hundred twelve million, two hundred sixteen thousand, six hundred fifty".