101221012210 has 24 divisors (see below), whose sum is σ = 183824692740. Its totient is φ = 40130049792.

The previous prime is 101221012201. The next prime is 101221012241. The reversal of 101221012210 is 12210122101.

It can be written as a sum of positive squares in 6 ways, for example, as 510624409 + 100710387801 = 22597^2 + 317349^2 .

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 268665 + ... + 524044.

Almost surely, 2^101221012210 is an apocalyptic number.

101221012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101221012210 is a deficient number, since it is larger than the sum of its proper divisors (82603680530).

101221012210 is an equidigital number, since it uses as much as digits as its factorization.

101221012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792942 (or 792829 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101221012210 its reverse (12210122101), we get a palindrome (113431134311).

The spelling of 101221012210 in words is "one hundred one billion, two hundred twenty-one million, twelve thousand, two hundred ten".