202121122020120 has 192 divisors, whose sum is σ = 685532036966400. Its totient is φ = 51549681173760.

The previous prime is 202121122020091. The next prime is 202121122020137. The reversal of 202121122020120 is 21020221121202.

It is a happy number.

202121122020120 is a `hidden beast` number, since 2 + 0 + 212 + 11 + 220 + 201 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 202121122020093 and 202121122020102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71806065 + ... + 74567775.

It is an arithmetic number, because the mean of its divisors is an integer number (3570479359200).

Almost surely, 2^{202121122020120} is an apocalyptic number.

202121122020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202121122020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342766018483200).

202121122020120 is an abundant number, since it is smaller than the sum of its proper divisors (483410914946280).

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

202121122020120 is a wasteful number, since it uses less digits than its factorization.

202121122020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770590 (or 2770583 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 202121122020120 its reverse (21020221121202), we get a palindrome (223141343141322).

The spelling of 202121122020120 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred twenty-two million, twenty thousand, one hundred twenty".