20101102111002 has 256 divisors, whose sum is σ = 45957876940800. Its totient is φ = 5806340064000.

The previous prime is 20101102110953. The next prime is 20101102111003. The reversal of 20101102111002 is 20011120110102.

It is not an unprimeable number, because it can be changed into a prime (20101102111003) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20787075123 + ... + 20787076089.

It is an arithmetic number, because the mean of its divisors is an integer number (179522956800).

Almost surely, 2^{20101102111002} is an apocalyptic number.

20101102111002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101102111002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22978938470400).

20101102111002 is an abundant number, since it is smaller than the sum of its proper divisors (25856774829798).

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

20101102111002 is a wasteful number, since it uses less digits than its factorization.

20101102111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20101102111002 its reverse (20011120110102), we get a palindrome (40112222221104).

Subtracting from 20101102111002 its reverse (20011120110102), we obtain a square (89982000900 = 299970²).

The spelling of 20101102111002 in words is "twenty trillion, one hundred one billion, one hundred two million, one hundred eleven thousand, two".