1046199619921 has 9 divisors (see below), whose sum is σ = 1111379313499. Its totient is φ = 984642100384.

The previous prime is 1046199619903. The next prime is 1046199619943. The reversal of 1046199619921 is 1299169916401.

The square root of 1046199619921 is 1022839.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 814515275025 + 231684344896 = 902505^2 + 481336^2 .

It is not a de Polignac number, because 1046199619921 - 2¹¹ = 1046199617873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1046199616921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17358180 + ... + 17418346.

Almost surely, 2^{1046199619921} is an apocalyptic number.

1046199619921 is the 1022839-th square number.

1046199619921 is the 511420-th centered octagonal number.

It is an amenable number.

1046199619921 is a deficient number, since it is larger than the sum of its proper divisors (65179693578).

1046199619921 is an frugal number, since it uses more digits than its factorization.

1046199619921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120368 (or 60184 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 58.

The spelling of 1046199619921 in words is "one trillion, forty-six billion, one hundred ninety-nine million, six hundred nineteen thousand, nine hundred twenty-one".