101011221010 has 48 divisors (see below), whose sum is σ = 223946624664. Its totient is φ = 32595214848.

The previous prime is 101011220957. The next prime is 101011221011. The reversal of 101011221010 is 10122110101.

It can be written as a sum of positive squares in 4 ways, for example, as 100761170041 + 250050969 = 317429^2 + 15813^2 .

It is a super-3 number, since 3×101011221010³ (a number of 34 digits) contains 333 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 (101011221011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6054769 + ... + 6071428.

Almost surely, 2^101011221010 is an apocalyptic number.

101011221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101011221010 is an abundant number, since it is smaller than the sum of its proper divisors (122935403654).

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

101011221010 is a wasteful number, since it uses less digits than its factorization.

101011221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12126235 (or 12126228 counting only the distinct ones).

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

Adding to 101011221010 its reverse (10122110101), we get a palindrome (111133331111).

The spelling of 101011221010 in words is "one hundred one billion, eleven million, two hundred twenty-one thousand, ten".