221210021211320 has 64 divisors (see below), whose sum is σ = 502972069739040. Its totient is φ = 87555608179200.

The previous prime is 221210021211269. The next prime is 221210021211379. The reversal of 221210021211320 is 23112120012122.

It is a super-2 number, since 2×221210021211320² (a number of 29 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 = 221210021211292 and 221210021211301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74290511 + ... + 77210750.

Almost surely, 2^{221210021211320} is an apocalyptic number.

221210021211320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210021211320 is an abundant number, since it is smaller than the sum of its proper divisors (281762048527720).

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

221210021211320 is a wasteful number, since it uses less digits than its factorization.

221210021211320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151501656 (or 151501652 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 221210021211320 its reverse (23112120012122), we get a palindrome (244322141223442).

The spelling of 221210021211320 in words is "two hundred twenty-one trillion, two hundred ten billion, twenty-one million, two hundred eleven thousand, three hundred twenty".