1011021213044 has 12 divisors (see below), whose sum is σ = 1769397149604. Its totient is φ = 505479170304.

The previous prime is 1011021213043. The next prime is 1011021213047. The reversal of 1011021213044 is 4403121201101.

It can be written as a sum of positive squares in 2 ways, for example, as 209974732900 + 801046480144 = 458230^2 + 895012^2 .

It is a super-2 number, since 2×1011021213044² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011021213043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7786619 + ... + 7915394.

It is an arithmetic number, because the mean of its divisors is an integer number (147449762467).

Almost surely, 2^{1011021213044} is an apocalyptic number.

It is an amenable number.

1011021213044 is a deficient number, since it is larger than the sum of its proper divisors (758375936560).

1011021213044 is a wasteful number, since it uses less digits than its factorization.

1011021213044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15718114 (or 15718112 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1011021213044 its reverse (4403121201101), we get a palindrome (5414142414145).

The spelling of 1011021213044 in words is "one trillion, eleven billion, twenty-one million, two hundred thirteen thousand, forty-four".