102021110012020 has 24 divisors (see below), whose sum is σ = 214244676238824. Its totient is φ = 40808378249856.

The previous prime is 102021110011999. The next prime is 102021110012047. The reversal of 102021110012020 is 20210011120201.

It can be written as a sum of positive squares in 4 ways, for example, as 23267483555044 + 78753626456976 = 4823638^2 + 8874324^2 .

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, 9753502 + ... + 17296618.

It is an arithmetic number, because the mean of its divisors is an integer number (8926861509951).

Almost surely, 2^{102021110012020} is an apocalyptic number.

102021110012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021110012020 is an abundant number, since it is smaller than the sum of its proper divisors (112223566226804).

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

102021110012020 is a wasteful number, since it uses less digits than its factorization.

102021110012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8219379 (or 8219377 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102021110012020 its reverse (20210011120201), we get a palindrome (122231121132221).

The spelling of 102021110012020 in words is "one hundred two trillion, twenty-one billion, one hundred ten million, twelve thousand, twenty".