101221010 has 32 divisors (see below), whose sum is σ = 199374912. Its totient is φ = 36694080.

The previous prime is 101220971. The next prime is 101221019. The reversal of 101221010 is 10122101.

It is not an unprimeable number, because it can be changed into a prime (101221019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39797 + ... + 42263.

It is an arithmetic number, because the mean of its divisors is an integer number (6230466).

Almost surely, 2^101221010 is an apocalyptic number.

101221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101221010 is a deficient number, since it is larger than the sum of its proper divisors (98153902).

101221010 is a wasteful number, since it uses less digits than its factorization.

101221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 101221010 is about 10060.8652709397. The cubic root of 101221010 is about 466.0403883529.

Adding to 101221010 its reverse (10122101), we get a palindrome (111343111).

It can be divided in two parts, 1012 and 21010, that added together give a palindrome (22022).

The spelling of 101221010 in words is "one hundred one million, two hundred twenty-one thousand, ten".