202101020 has 24 divisors (see below), whose sum is σ = 462995568. Its totient is φ = 73491200.

The previous prime is 202100999. The next prime is 202101041. The reversal of 202101020 is 20101202.

It is an interprime number because it is at equal distance from previous prime (202100999) and next prime (202101041).

It is a junction number, because it is equal to n+sod(n) for n = 202100989 and 202101007.

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, 459101 + ... + 459540.

It is an arithmetic number, because the mean of its divisors is an integer number (19291482).

Almost surely, 2^202101020 is an apocalyptic number.

202101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202101020 is an abundant number, since it is smaller than the sum of its proper divisors (260894548).

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

202101020 is a wasteful number, since it uses less digits than its factorization.

202101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918661 (or 918659 counting only the distinct ones).

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

The square root of 202101020 is about 14216.2238305395. The cubic root of 202101020 is about 586.8442249802.

Adding to 202101020 its reverse (20101202), we get a palindrome (222202222).

The spelling of 202101020 in words is "two hundred two million, one hundred one thousand, twenty".