21321223002120 has 256 divisors, whose sum is σ = 71770453574400. Its totient is φ = 5040667197440.

The previous prime is 21321223002097. The next prime is 21321223002179. The reversal of 21321223002120 is 2120032212312.

It is a super-2 number, since 2×21321223002120² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1969554 + ... + 6820673.

It is an arithmetic number, because the mean of its divisors is an integer number (280353334275).

Almost surely, 2^{21321223002120} is an apocalyptic number.

21321223002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321223002120 is an abundant number, since it is smaller than the sum of its proper divisors (50449230572280).

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

21321223002120 is a wasteful number, since it uses less digits than its factorization.

21321223002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8790328 (or 8790324 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21321223002120 its reverse (2120032212312), we get a palindrome (23441255214432).

The spelling of 21321223002120 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred twenty-three million, two thousand, one hundred twenty".