202120102101020 has 48 divisors (see below), whose sum is σ = 446987681968800. Its totient is φ = 76559301826560.

The previous prime is 202120102101007. The next prime is 202120102101037. The reversal of 202120102101020 is 20101201021202.

It is a junction number, because it is equal to n+sod(n) for n = 202120102100986 and 202120102101004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115725725 + ... + 117459284.

It is an arithmetic number, because the mean of its divisors is an integer number (9312243374350).

Almost surely, 2^{202120102101020} is an apocalyptic number.

202120102101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120102101020 is an abundant number, since it is smaller than the sum of its proper divisors (244867579867780).

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

202120102101020 is a wasteful number, since it uses less digits than its factorization.

202120102101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233187318 (or 233187316 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202120102101020 its reverse (20101201021202), we get a palindrome (222221303122222).

The spelling of 202120102101020 in words is "two hundred two trillion, one hundred twenty billion, one hundred two million, one hundred one thousand, twenty".