2102042217650 has 24 divisors (see below), whose sum is σ = 3932398532484. Its totient is φ = 835956670400.

The previous prime is 2102042217643. The next prime is 2102042217659. The reversal of 2102042217650 is 567122402012.

It can be written as a sum of positive squares in 6 ways, for example, as 1816233296329 + 285808921321 = 1347677^2 + 534611^2 .

It is not an unprimeable number, because it can be changed into a prime (2102042217659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121496681 + ... + 121513980.

Almost surely, 2^{2102042217650} is an apocalyptic number.

2102042217650 is a deficient number, since it is larger than the sum of its proper divisors (1830356314834).

2102042217650 is a wasteful number, since it uses less digits than its factorization.

2102042217650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243010846 (or 243010841 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 2102042217650 its reverse (567122402012), we get a palindrome (2669164619662).

The spelling of 2102042217650 in words is "two trillion, one hundred two billion, forty-two million, two hundred seventeen thousand, six hundred fifty".