101661210210 has 64 divisors (see below), whose sum is σ = 278984217600. Its totient is φ = 23225011392.

The previous prime is 101661210199. The next prime is 101661210227. The reversal of 101661210210 is 12012166101.

It is a super-2 number, since 2×101661210210² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 293281 + ... + 537899.

It is an arithmetic number, because the mean of its divisors is an integer number (4359128400).

Almost surely, 2^101661210210 is an apocalyptic number.

101661210210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101661210210 is an abundant number, since it is smaller than the sum of its proper divisors (177323007390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101661210210 is a wasteful number, since it uses less digits than its factorization.

101661210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246615.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 101661210210 its reverse (12012166101), we get a palindrome (113673376311).

The spelling of 101661210210 in words is "one hundred one billion, six hundred sixty-one million, two hundred ten thousand, two hundred ten".