21101202113020 has 12 divisors (see below), whose sum is σ = 44312524437384. Its totient is φ = 8440480845200.

The previous prime is 21101202113009. The next prime is 21101202113027. The reversal of 21101202113020 is 2031120210112.

It is a super-2 number, since 2×21101202113020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21101202112985 and 21101202113003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101202113027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527530052806 + ... + 527530052845.

It is an arithmetic number, because the mean of its divisors is an integer number (3692710369782).

Almost surely, 2^{21101202113020} is an apocalyptic number.

21101202113020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101202113020 is an abundant number, since it is smaller than the sum of its proper divisors (23211322324364).

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

21101202113020 is a wasteful number, since it uses less digits than its factorization.

21101202113020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055060105660 (or 1055060105658 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21101202113020 its reverse (2031120210112), we get a palindrome (23132322323132).

The spelling of 21101202113020 in words is "twenty-one trillion, one hundred one billion, two hundred two million, one hundred thirteen thousand, twenty".