21222021023100 has 108 divisors (see below), whose sum is σ = 70020258894040. Its totient is φ = 5361352675200.

The previous prime is 21222021023057. The next prime is 21222021023101. The reversal of 21222021023100 is 132012022212.

21222021023100 is a `hidden beast` number, since 2 + 1 + 2 + 220 + 210 + 231 + 0 + 0 = 666.

It is a super-2 number, since 2×21222021023100² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222021023101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 620509831 + ... + 620544030.

Almost surely, 2^{21222021023100} is an apocalyptic number.

21222021023100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222021023100 is an abundant number, since it is smaller than the sum of its proper divisors (48798237870940).

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

21222021023100 is a wasteful number, since it uses less digits than its factorization.

21222021023100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241053900 (or 1241053890 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21222021023100 its reverse (132012022212), we get a palindrome (21354033045312).

The spelling of 21222021023100 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, twenty-three thousand, one hundred".