202120012121020 has 96 divisors (see below), whose sum is σ = 502610478612480. Its totient is φ = 66802656856320.

The previous prime is 202120012120973. The next prime is 202120012121101. The reversal of 202120012121020 is 20121210021202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 202120012120985 and 202120012121003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36886044 + ... + 42009763.

It is an arithmetic number, because the mean of its divisors is an integer number (5235525818880).

Almost surely, 2^{202120012121020} is an apocalyptic number.

202120012121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120012121020 is an abundant number, since it is smaller than the sum of its proper divisors (300490466491460).

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

202120012121020 is a wasteful number, since it uses less digits than its factorization.

202120012121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78896483 (or 78896481 counting only the distinct ones).

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

Adding to 202120012121020 its reverse (20121210021202), we get a palindrome (222241222142222).

The spelling of 202120012121020 in words is "two hundred two trillion, one hundred twenty billion, twelve million, one hundred twenty-one thousand, twenty".