20101101102 has 40 divisors (see below), whose sum is σ = 45254899272. Its totient is φ = 6668600400.

The previous prime is 20101101101. The next prime is 20101101109. The reversal of 20101101102 is 20110110102.

It is a happy number.

It is a super-2 number, since 2×20101101102² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101101101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 259849 + ... + 328212.

Almost surely, 2^20101101102 is an apocalyptic number.

20101101102 is an abundant number, since it is smaller than the sum of its proper divisors (25153798170).

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

20101101102 is a wasteful number, since it uses less digits than its factorization.

20101101102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588286 (or 588277 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20101101102 its reverse (20110110102), we get a palindrome (40211211204).

The spelling of 20101101102 in words is "twenty billion, one hundred one million, one hundred one thousand, one hundred two".