221202012212120 has 32 divisors (see below), whose sum is σ = 497705980636800. Its totient is φ = 88480546545408.

The previous prime is 221202012212101. The next prime is 221202012212161. The reversal of 221202012212120 is 21212210202122.

221202012212120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 221202012212092 and 221202012212101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6105497 + ... + 21901623.

It is an arithmetic number, because the mean of its divisors is an integer number (15553311894900).

Almost surely, 2^{221202012212120} is an apocalyptic number.

221202012212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221202012212120 is an abundant number, since it is smaller than the sum of its proper divisors (276503968424680).

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

221202012212120 is a wasteful number, since it uses less digits than its factorization.

221202012212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16146227 (or 16146223 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221202012212120 its reverse (21212210202122), we get a palindrome (242414222414242).

The spelling of 221202012212120 in words is "two hundred twenty-one trillion, two hundred two billion, twelve million, two hundred twelve thousand, one hundred twenty".