10021102020 has 72 divisors (see below), whose sum is σ = 30411011904. Its totient is φ = 2671092288.

The previous prime is 10021102019. The next prime is 10021102031. The reversal of 10021102020 is 2020112001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10021101993 and 10021102011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 432777 + ... + 455343.

Almost surely, 2^10021102020 is an apocalyptic number.

10021102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021102020 is an abundant number, since it is smaller than the sum of its proper divisors (20389909884).

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

10021102020 is a wasteful number, since it uses less digits than its factorization.

10021102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25049 (or 25044 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10021102020 its reverse (2020112001), we get a palindrome (12041214021).

The spelling of 10021102020 in words is "ten billion, twenty-one million, one hundred two thousand, twenty".