102220211022021 has 12 divisors (see below), whose sum is σ = 147657263135148. Its totient is φ = 68144108633664.

The previous prime is 102220211021989. The next prime is 102220211022047. The reversal of 102220211022021 is 120220112022201.

It is a happy number.

102220211022021 is a `hidden beast` number, since 10 + 2 + 220 + 211 + 0 + 220 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 82863607673025 + 19356603348996 = 9102945^2 + 4399614^2 .

It is not a de Polignac number, because 102220211022021 - 2⁵ = 102220211021989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102220211021985 and 102220211022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220211022821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224652960 + ... + 225107513.

It is an arithmetic number, because the mean of its divisors is an integer number (12304771927929).

Almost surely, 2^{102220211022021} is an apocalyptic number.

It is an amenable number.

102220211022021 is a deficient number, since it is larger than the sum of its proper divisors (45437052113127).

102220211022021 is a wasteful number, since it uses less digits than its factorization.

102220211022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449785732 (or 449785729 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 102220211022021 its reverse (120220112022201), we get a palindrome (222440323044222).

The spelling of 102220211022021 in words is "one hundred two trillion, two hundred twenty billion, two hundred eleven million, twenty-two thousand, twenty-one".