11021211220020 has 24 divisors (see below), whose sum is σ = 30859391416224. Its totient is φ = 2938989658656.

The previous prime is 11021211219979. The next prime is 11021211220027. The reversal of 11021211220020 is 2002211212011.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021211220027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91843426774 + ... + 91843426893.

It is an arithmetic number, because the mean of its divisors is an integer number (1285807975676).

Almost surely, 2^{11021211220020} is an apocalyptic number.

11021211220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11021211220020 is an abundant number, since it is smaller than the sum of its proper divisors (19838180196204).

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

11021211220020 is a wasteful number, since it uses less digits than its factorization.

11021211220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183686853679 (or 183686853677 counting only the distinct ones).

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

Adding to 11021211220020 its reverse (2002211212011), we get a palindrome (13023422432031).

The spelling of 11021211220020 in words is "eleven trillion, twenty-one billion, two hundred eleven million, two hundred twenty thousand, twenty".