20020111010100 has 216 divisors, whose sum is σ = 62976029276160. Its totient is φ = 5319656778240.

The previous prime is 20020111010071. The next prime is 20020111010143. The reversal of 20020111010100 is 101011102002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 374159949 + ... + 374213451.

Almost surely, 2^{20020111010100} is an apocalyptic number.

20020111010100 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 20020111010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31488014638080).

20020111010100 is an abundant number, since it is smaller than the sum of its proper divisors (42955918266060).

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

20020111010100 is a wasteful number, since it uses less digits than its factorization.

20020111010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54999 (or 54989 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20020111010100 its reverse (101011102002), we get a palindrome (20121122112102).

The spelling of 20020111010100 in words is "twenty trillion, twenty billion, one hundred eleven million, ten thousand, one hundred".