21213555620060 has 48 divisors (see below), whose sum is σ = 46496619086400. Its totient is φ = 8114524391424.

The previous prime is 21213555620021. The next prime is 21213555620077. The reversal of 21213555620060 is 6002655531212.

It is a super-2 number, since 2×21213555620060² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21213555619996 and 21213555620023.

It is a congruent number.

It is an unprimeable number.

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, 3685115 + ... + 7483794.

It is an arithmetic number, because the mean of its divisors is an integer number (968679564300).

Almost surely, 2^{21213555620060} is an apocalyptic number.

21213555620060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213555620060 is an abundant number, since it is smaller than the sum of its proper divisors (25283063466340).

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

21213555620060 is a wasteful number, since it uses less digits than its factorization.

21213555620060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11173070 (or 11173068 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 21213555620060 in words is "twenty-one trillion, two hundred thirteen billion, five hundred fifty-five million, six hundred twenty thousand, sixty".