101211122020100 has 72 divisors (see below), whose sum is σ = 223805524279680. Its totient is φ = 39714651550080.

The previous prime is 101211122020097. The next prime is 101211122020103. The reversal of 101211122020100 is 1020221112101.

It is an interprime number because it is at equal distance from previous prime (101211122020097) and next prime (101211122020103).

It is a super-2 number, since 2×101211122020100² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101211122020103) 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, 34101431 + ... + 36950369.

It is an arithmetic number, because the mean of its divisors is an integer number (3108410059440).

Almost surely, 2^{101211122020100} is an apocalyptic number.

101211122020100 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 101211122020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111902762139840).

101211122020100 is an abundant number, since it is smaller than the sum of its proper divisors (122594402259580).

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

101211122020100 is a wasteful number, since it uses less digits than its factorization.

101211122020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855709 (or 2855702 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101211122020100 its reverse (1020221112101), we get a palindrome (102231343132201).

The spelling of 101211122020100 in words is "one hundred one trillion, two hundred eleven billion, one hundred twenty-two million, twenty thousand, one hundred".