20012121100210 has 128 divisors (see below), whose sum is σ = 41516224807680. Its totient is φ = 6898258059264.

The previous prime is 20012121100183. The next prime is 20012121100211. The reversal of 20012121100210 is 1200112121002.

It is not an unprimeable number, because it can be changed into a prime (20012121100211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10597342 + ... + 12342118.

It is an arithmetic number, because the mean of its divisors is an integer number (324345506310).

Almost surely, 2^{20012121100210} is an apocalyptic number.

20012121100210 is an abundant number, since it is smaller than the sum of its proper divisors (21504103707470).

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

20012121100210 is a wasteful number, since it uses less digits than its factorization.

20012121100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744940.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20012121100210 its reverse (1200112121002), we get a palindrome (21212233221212).

The spelling of 20012121100210 in words is "twenty trillion, twelve billion, one hundred twenty-one million, one hundred thousand, two hundred ten".