221120221021000 has 128 divisors (see below), whose sum is σ = 595307366784000. Its totient is φ = 75303837139200.

The previous prime is 221120221020991. The next prime is 221120221021061. The reversal of 221120221021000 is 120122021122.

It is a happy number.

It is a super-5 number, since 5×221120221021000⁵ (a number of 73 digits) contains 55555 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104959024 + ... + 107045023.

It is an arithmetic number, because the mean of its divisors is an integer number (4650838803000).

Almost surely, 2^{221120221021000} is an apocalyptic number.

221120221021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120221021000 is an abundant number, since it is smaller than the sum of its proper divisors (374187145763000).

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

221120221021000 is a wasteful number, since it uses less digits than its factorization.

221120221021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212004224 (or 212004210 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221120221021000 its reverse (120122021122), we get a palindrome (221240343042122).

The spelling of 221120221021000 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, twenty-one thousand".