20211101221020 has 24 divisors (see below), whose sum is σ = 56591083419024. Its totient is φ = 5389626992256.

The previous prime is 20211101221019. The next prime is 20211101221037. The reversal of 20211101221020 is 2012210111202.

It is a super-2 number, since 2×20211101221020² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168425843449 + ... + 168425843568.

It is an arithmetic number, because the mean of its divisors is an integer number (2357961809126).

Almost surely, 2^{20211101221020} is an apocalyptic number.

20211101221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211101221020 is an abundant number, since it is smaller than the sum of its proper divisors (36379982198004).

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

20211101221020 is a wasteful number, since it uses less digits than its factorization.

20211101221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336851687029 (or 336851687027 counting only the distinct ones).

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

Adding to 20211101221020 its reverse (2012210111202), we get a palindrome (22223311332222).

The spelling of 20211101221020 in words is "twenty trillion, two hundred eleven billion, one hundred one million, two hundred twenty-one thousand, twenty".