20021121010200 has 384 divisors, whose sum is σ = 66442072435200. Its totient is φ = 4969697157120.

The previous prime is 20021121010171. The next prime is 20021121010211. The reversal of 20021121010200 is 201012112002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 372854554 + ... + 372908246.

It is an arithmetic number, because the mean of its divisors is an integer number (173026230300).

Almost surely, 2^{20021121010200} is an apocalyptic number.

20021121010200 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 20021121010200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33221036217600).

20021121010200 is an abundant number, since it is smaller than the sum of its proper divisors (46420951425000).

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

20021121010200 is a wasteful number, since it uses less digits than its factorization.

20021121010200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54131 (or 54122 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021121010200 its reverse (201012112002), we get a palindrome (20222133122202).

The spelling of 20021121010200 in words is "twenty trillion, twenty-one billion, one hundred twenty-one million, ten thousand, two hundred".