1021121440442 has 16 divisors (see below), whose sum is σ = 1534439504520. Its totient is φ = 509642434368.

The previous prime is 1021121440403. The next prime is 1021121440457. The reversal of 1021121440442 is 2440441211201.

It can be written as a sum of positive squares in 4 ways, for example, as 522556940161 + 498564500281 = 722881^2 + 706091^2 .

It is a super-2 number, since 2×1021121440442² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2271428 + ... + 2683584.

Almost surely, 2^{1021121440442} is an apocalyptic number.

1021121440442 is a deficient number, since it is larger than the sum of its proper divisors (513318064078).

1021121440442 is a wasteful number, since it uses less digits than its factorization.

1021121440442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414385.

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 1021121440442 its reverse (2440441211201), we get a palindrome (3461562651643).

The spelling of 1021121440442 in words is "one trillion, twenty-one billion, one hundred twenty-one million, four hundred forty thousand, four hundred forty-two".