101211221080 has 128 divisors (see below), whose sum is σ = 246153401280. Its totient is φ = 37314478080.

The previous prime is 101211221057. The next prime is 101211221081. The reversal of 101211221080 is 80122112101.

It is a super-2 number, since 2×101211221080² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211221081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7875460 + ... + 7888300.

Almost surely, 2^101211221080 is an apocalyptic number.

101211221080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101211221080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123076700640).

101211221080 is an abundant number, since it is smaller than the sum of its proper divisors (144942180200).

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

101211221080 is a wasteful number, since it uses less digits than its factorization.

101211221080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13109 (or 13105 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 101211221080 its reverse (80122112101), we get a palindrome (181333333181).

The spelling of 101211221080 in words is "one hundred one billion, two hundred eleven million, two hundred twenty-one thousand, eighty".