221101022001020 has 48 divisors (see below), whose sum is σ = 530643723825600. Its totient is φ = 75805883111424.

The previous prime is 221101022001011. The next prime is 221101022001037. The reversal of 221101022001020 is 20100220101122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 221101022000986 and 221101022001004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65247506 + ... + 68552454.

It is an arithmetic number, because the mean of its divisors is an integer number (11055077579700).

Almost surely, 2^{221101022001020} is an apocalyptic number.

221101022001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221101022001020 is an abundant number, since it is smaller than the sum of its proper divisors (309542701824580).

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

221101022001020 is a wasteful number, since it uses less digits than its factorization.

221101022001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782822 (or 3782820 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221101022001020 its reverse (20100220101122), we get a palindrome (241201242102142).

The spelling of 221101022001020 in words is "two hundred twenty-one trillion, one hundred one billion, twenty-two million, one thousand, twenty".