20112011211021 has 16 divisors (see below), whose sum is σ = 26820365332800. Its totient is φ = 13405832512128.

The previous prime is 20112011210987. The next prime is 20112011211023. The reversal of 20112011211021 is 12011211021102.

It is a happy number.

It is not a de Polignac number, because 20112011211021 - 2⁶ = 20112011210957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112011211023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864314775 + ... + 864338043.

It is an arithmetic number, because the mean of its divisors is an integer number (1676272833300).

Almost surely, 2^{20112011211021} is an apocalyptic number.

It is an amenable number.

20112011211021 is a deficient number, since it is larger than the sum of its proper divisors (6708354121779).

20112011211021 is a wasteful number, since it uses less digits than its factorization.

20112011211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57628.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20112011211021 its reverse (12011211021102), we get a palindrome (32123222232123).

The spelling of 20112011211021 in words is "twenty trillion, one hundred twelve billion, eleven million, two hundred eleven thousand, twenty-one".