102021122012020 has 12 divisors (see below), whose sum is σ = 214244356225284. Its totient is φ = 40808448804800.

The previous prime is 102021122011997. The next prime is 102021122012023. The reversal of 102021122012020 is 20210221120201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 39965989721956 + 62055132290064 = 6321866^2 + 7877508^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102021122011985 and 102021122012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021122012023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550528050281 + ... + 2550528050320.

It is an arithmetic number, because the mean of its divisors is an integer number (17853696352107).

Almost surely, 2^{102021122012020} is an apocalyptic number.

102021122012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021122012020 is an abundant number, since it is smaller than the sum of its proper divisors (112223234213264).

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

102021122012020 is a wasteful number, since it uses less digits than its factorization.

102021122012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101056100610 (or 5101056100608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102021122012020 its reverse (20210221120201), we get a palindrome (122231343132221).

The spelling of 102021122012020 in words is "one hundred two trillion, twenty-one billion, one hundred twenty-two million, twelve thousand, twenty".