1021220011224 has 96 divisors (see below), whose sum is σ = 3163750655520. Its totient is φ = 291515770368.

The previous prime is 1021220011223. The next prime is 1021220011283. The reversal of 1021220011224 is 4221100221201.

It is a super-2 number, since 2×1021220011224² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1021220011197 and 1021220011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220011223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344029 + ... + 1469964.

It is an arithmetic number, because the mean of its divisors is an integer number (32955735995).

Almost surely, 2^{1021220011224} is an apocalyptic number.

1021220011224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1021220011224 is an abundant number, since it is smaller than the sum of its proper divisors (2142530644296).

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

1021220011224 is a wasteful number, since it uses less digits than its factorization.

1021220011224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815129 (or 1815122 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1021220011224 its reverse (4221100221201), we get a palindrome (5242320232425).

The spelling of 1021220011224 in words is "one trillion, twenty-one billion, two hundred twenty million, eleven thousand, two hundred twenty-four".