21220101202011 has 32 divisors (see below), whose sum is σ = 29127152909568. Its totient is φ = 13731726476160.

The previous prime is 21220101201989. The next prime is 21220101202033. The reversal of 21220101202011 is 11020210102212.

It is an interprime number because it is at equal distance from previous prime (21220101201989) and next prime (21220101202033).

It is not a de Polignac number, because 21220101202011 - 2⁶ = 21220101201947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220101222011) 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, 165455436 + ... + 165583638.

It is an arithmetic number, because the mean of its divisors is an integer number (910223528424).

Almost surely, 2^{21220101202011} is an apocalyptic number.

21220101202011 is a deficient number, since it is larger than the sum of its proper divisors (7907051707557).

21220101202011 is a wasteful number, since it uses less digits than its factorization.

21220101202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131771.

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

Adding to 21220101202011 its reverse (11020210102212), we get a palindrome (32240311304223).

The spelling of 21220101202011 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred two thousand, eleven".