21132222021020 has 48 divisors (see below), whose sum is σ = 48412610517600. Its totient is φ = 7684347390720.

The previous prime is 21132222020893. The next prime is 21132222021023. The reversal of 21132222021020 is 2012022223112.

It is a super-2 number, since 2×21132222021020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21132222020983 and 21132222021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132222021023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18186866 + ... + 19313894.

It is an arithmetic number, because the mean of its divisors is an integer number (1008596052450).

Almost surely, 2^{21132222021020} is an apocalyptic number.

21132222021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21132222021020 is an abundant number, since it is smaller than the sum of its proper divisors (27280388496580).

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

21132222021020 is a wasteful number, since it uses less digits than its factorization.

21132222021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212278 (or 1212276 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21132222021020 its reverse (2012022223112), we get a palindrome (23144244244132).

The spelling of 21132222021020 in words is "twenty-one trillion, one hundred thirty-two billion, two hundred twenty-two million, twenty-one thousand, twenty".