101211110020 has 24 divisors (see below), whose sum is σ = 214424250264. Its totient is φ = 40126173696.

The previous prime is 101211110009. The next prime is 101211110023. The reversal of 101211110020 is 20011112101.

It can be written as a sum of positive squares in 4 ways, for example, as 989479936 + 100221630084 = 31456^2 + 316578^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 101211109979 and 101211110006.

It is not an unprimeable number, because it can be changed into a prime (101211110023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22389579 + ... + 22394098.

It is an arithmetic number, because the mean of its divisors is an integer number (8934343761).

Almost surely, 2^101211110020 is an apocalyptic number.

101211110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101211110020 is an abundant number, since it is smaller than the sum of its proper divisors (113213140244).

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

101211110020 is a wasteful number, since it uses less digits than its factorization.

101211110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44783799 (or 44783797 counting only the distinct ones).

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

Adding to 101211110020 its reverse (20011112101), we get a palindrome (121222222121).

The spelling of 101211110020 in words is "one hundred one billion, two hundred eleven million, one hundred ten thousand, twenty".