20001102210 has 192 divisors, whose sum is σ = 56816323200. Its totient is φ = 4864167936.

The previous prime is 20001102167. The next prime is 20001102269. The reversal of 20001102210 is 1220110002.

It is a super-2 number, since 2×20001102210² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 20001102192 and 20001102201.

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, 6135561 + ... + 6138819.

It is an arithmetic number, because the mean of its divisors is an integer number (295918350).

Almost surely, 2^20001102210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001102210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28408161600).

20001102210 is an abundant number, since it is smaller than the sum of its proper divisors (36815220990).

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

20001102210 is a wasteful number, since it uses less digits than its factorization.

20001102210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425 (or 3422 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20001102210 its reverse (1220110002), we get a palindrome (21221212212).

The spelling of 20001102210 in words is "twenty billion, one million, one hundred two thousand, two hundred ten".