2101000615172 has 6 divisors (see below), whose sum is σ = 3676751076558. Its totient is φ = 1050500307584.

The previous prime is 2101000615171. The next prime is 2101000615187. The reversal of 2101000615172 is 2715160001012.

It can be written as a sum of positive squares in only one way, i.e., 1204449180676 + 896551434496 = 1097474^2 + 946864^2 .

It is a super-3 number, since 3×2101000615172³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2101000615171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262625076893 + ... + 262625076900.

It is an arithmetic number, because the mean of its divisors is an integer number (612791846093).

Almost surely, 2^{2101000615172} is an apocalyptic number.

It is an amenable number.

2101000615172 is a deficient number, since it is larger than the sum of its proper divisors (1575750461386).

2101000615172 is a wasteful number, since it uses less digits than its factorization.

2101000615172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525250153797 (or 525250153795 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 26.

Adding to 2101000615172 its reverse (2715160001012), we get a palindrome (4816160616184).

It can be divided in two parts, 2101000 and 615172, that added together give a palindrome (2716172).

The spelling of 2101000615172 in words is "two trillion, one hundred one billion, six hundred fifteen thousand, one hundred seventy-two".