20001102012210 has 256 divisors, whose sum is σ = 56468361461760. Its totient is φ = 4482694275840.

The previous prime is 20001102012173. The next prime is 20001102012233. The reversal of 20001102012210 is 1221020110002.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 44727147 + ... + 45172113.

It is an arithmetic number, because the mean of its divisors is an integer number (220579536960).

Almost surely, 2^{20001102012210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001102012210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28234180730880).

20001102012210 is an abundant number, since it is smaller than the sum of its proper divisors (36467259449550).

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

20001102012210 is a wasteful number, since it uses less digits than its factorization.

20001102012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445181.

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

Adding to 20001102012210 its reverse (1221020110002), we get a palindrome (21222122122212).

The spelling of 20001102012210 in words is "twenty trillion, one billion, one hundred two million, twelve thousand, two hundred ten".