20211121022100 has 72 divisors (see below), whose sum is σ = 58484424028128. Its totient is φ = 5388995049600.

The previous prime is 20211121022089. The next prime is 20211121022101. The reversal of 20211121022100 is 122012111202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20211121022100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211121022101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1438311 + ... + 6518510.

Almost surely, 2^{20211121022100} is an apocalyptic number.

20211121022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211121022100 is an abundant number, since it is smaller than the sum of its proper divisors (38273303006028).

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

20211121022100 is a wasteful number, since it uses less digits than its factorization.

20211121022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7965305 (or 7965298 counting only the distinct ones).

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

Adding to 20211121022100 its reverse (122012111202), we get a palindrome (20333133133302).

The spelling of 20211121022100 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, twenty-two thousand, one hundred".