4021234111020 has 192 divisors, whose sum is σ = 13596719431680. Its totient is φ = 867452136192.

The previous prime is 4021234110977. The next prime is 4021234111021. The reversal of 4021234111020 is 201114321204.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (4021234111021) 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 63 ways as a sum of consecutive naturals, for example, 1140729 + ... + 3056751.

It is an arithmetic number, because the mean of its divisors is an integer number (70816247040).

Almost surely, 2^{4021234111020} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021234111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6798359715840).

4021234111020 is an abundant number, since it is smaller than the sum of its proper divisors (9575485320660).

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

4021234111020 is a wasteful number, since it uses less digits than its factorization.

4021234111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916324 (or 1916322 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 4021234111020 its reverse (201114321204), we get a palindrome (4222348432224).

The spelling of 4021234111020 in words is "four trillion, twenty-one billion, two hundred thirty-four million, one hundred eleven thousand, twenty".