20110211220021 has 32 divisors (see below), whose sum is σ = 28943789521920. Its totient is φ = 12346561036800.

The previous prime is 20110211219983. The next prime is 20110211220049. The reversal of 20110211220021 is 12002211201102.

It is not a de Polignac number, because 20110211220021 - 2²¹ = 20110209122869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110211225021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74982441 + ... + 75250161.

It is an arithmetic number, because the mean of its divisors is an integer number (904493422560).

Almost surely, 2^{20110211220021} is an apocalyptic number.

It is an amenable number.

20110211220021 is a deficient number, since it is larger than the sum of its proper divisors (8833578301899).

20110211220021 is a wasteful number, since it uses less digits than its factorization.

20110211220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272237.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20110211220021 its reverse (12002211201102), we get a palindrome (32112422421123).

The spelling of 20110211220021 in words is "twenty trillion, one hundred ten billion, two hundred eleven million, two hundred twenty thousand, twenty-one".