1021144331402 has 8 divisors (see below), whose sum is σ = 1649540843076. Its totient is φ = 471297383712.

The previous prime is 1021144331393. The next prime is 1021144331411. The reversal of 1021144331402 is 2041334411201.

It is an interprime number because it is at equal distance from previous prime (1021144331393) and next prime (1021144331411).

It can be written as a sum of positive squares in 2 ways, for example, as 884598561961 + 136545769441 = 940531^2 + 369521^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 39274781977 = 1021144331402 / (1 + 0 + 2 + 1 + 1 + 4 + 4 + 3 + 3 + 1 + 4 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19637390963 + ... + 19637391014.

Almost surely, 2^{1021144331402} is an apocalyptic number.

1021144331402 is a deficient number, since it is larger than the sum of its proper divisors (628396511674).

1021144331402 is a wasteful number, since it uses less digits than its factorization.

1021144331402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39274781992.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 1021144331402 its reverse (2041334411201), we get a palindrome (3062478742603).

The spelling of 1021144331402 in words is "one trillion, twenty-one billion, one hundred forty-four million, three hundred thirty-one thousand, four hundred two".