102021212021020 has 24 divisors (see below), whose sum is σ = 214568667125568. Its totient is φ = 40746747307200.

The previous prime is 102021212020951. The next prime is 102021212021081. The reversal of 102021212021020 is 20120212120201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102021212020985 and 102021212021003.

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, 3858580276 + ... + 3858606715.

It is an arithmetic number, because the mean of its divisors is an integer number (8940361130232).

Almost surely, 2^{102021212021020} is an apocalyptic number.

102021212021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021212021020 is an abundant number, since it is smaller than the sum of its proper divisors (112547455104548).

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

102021212021020 is a wasteful number, since it uses less digits than its factorization.

102021212021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7717187661 (or 7717187659 counting only the distinct ones).

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

Adding to 102021212021020 its reverse (20120212120201), we get a palindrome (122141424141221).

The spelling of 102021212021020 in words is "one hundred two trillion, twenty-one billion, two hundred twelve million, twenty-one thousand, twenty".