21101223301020 has 108 divisors (see below), whose sum is σ = 65783719487304. Its totient is φ = 5474911927680.

The previous prime is 21101223301013. The next prime is 21101223301031. The reversal of 21101223301020 is 2010332210112.

21101223301020 is a `hidden beast` number, since 2 + 110 + 122 + 330 + 102 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21101223300984 and 21101223301002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42569146 + ... + 43061985.

Almost surely, 2^{21101223301020} is an apocalyptic number.

21101223301020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101223301020 is an abundant number, since it is smaller than the sum of its proper divisors (44682496186284).

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

21101223301020 is a wasteful number, since it uses less digits than its factorization.

21101223301020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85631220 (or 85631178 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21101223301020 its reverse (2010332210112), we get a palindrome (23111555511132).

The spelling of 21101223301020 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-three million, three hundred one thousand, twenty".