101221101010 has 32 divisors (see below), whose sum is σ = 185181800832. Its totient is φ = 39827948160.

The previous prime is 101221101001. The next prime is 101221101013. The reversal of 101221101010 is 10101122101.

It is a super-2 number, since 2×101221101010² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (101221101013) 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, 153622 + ... + 475438.

It is an arithmetic number, because the mean of its divisors is an integer number (5786931276).

Almost surely, 2^101221101010 is an apocalyptic number.

101221101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101221101010 is a deficient number, since it is larger than the sum of its proper divisors (83960699822).

101221101010 is a wasteful number, since it uses less digits than its factorization.

101221101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322338.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 101221101010 its reverse (10101122101), we get a palindrome (111322223111).

The spelling of 101221101010 in words is "one hundred one billion, two hundred twenty-one million, one hundred one thousand, ten".