20011111012210 has 32 divisors (see below), whose sum is σ = 36072275279040. Its totient is φ = 7992831586752.

The previous prime is 20011111012157. The next prime is 20011111012337. The reversal of 20011111012210 is 1221011111002.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40777681 + ... + 41265499.

It is an arithmetic number, because the mean of its divisors is an integer number (1127258602470).

Almost surely, 2^{20011111012210} is an apocalyptic number.

20011111012210 is a deficient number, since it is larger than the sum of its proper divisors (16061164266830).

20011111012210 is a wasteful number, since it uses less digits than its factorization.

20011111012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493770.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20011111012210 its reverse (1221011111002), we get a palindrome (21232122123212).

The spelling of 20011111012210 in words is "twenty trillion, eleven billion, one hundred eleven million, twelve thousand, two hundred ten".