200102122020 has 384 divisors, whose sum is σ = 622709047296. Its totient is φ = 47800295424.

The previous prime is 200102122009. The next prime is 200102122021. The reversal of 200102122020 is 20221201002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 200102121987 and 200102122005.

It is not an unprimeable number, because it can be changed into a prime (200102122021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 397817089 + ... + 397817591.

It is an arithmetic number, because the mean of its divisors is an integer number (1621638144).

Almost surely, 2^200102122020 is an apocalyptic number.

200102122020 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 200102122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311354523648).

200102122020 is an abundant number, since it is smaller than the sum of its proper divisors (422606925276).

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

200102122020 is a wasteful number, since it uses less digits than its factorization.

200102122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 200102122020 its reverse (20221201002), we get a palindrome (220323323022).

The spelling of 200102122020 in words is "two hundred billion, one hundred two million, one hundred twenty-two thousand, twenty".