1401100021421 has 8 divisors (see below), whose sum is σ = 1403764479288. Its totient is φ = 1398435840000.

The previous prime is 1401100021403. The next prime is 1401100021459. The reversal of 1401100021421 is 1241200011041.

It can be written as a sum of positive squares in 4 ways, for example, as 107446284100 + 1293653737321 = 327790^2 + 1137389^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401100021421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1401100021421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401100021481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12104621 + ... + 12219821.

It is an arithmetic number, because the mean of its divisors is an integer number (175470559911).

Almost surely, 2^{1401100021421} is an apocalyptic number.

It is an amenable number.

1401100021421 is a deficient number, since it is larger than the sum of its proper divisors (2664457867).

1401100021421 is a wasteful number, since it uses less digits than its factorization.

1401100021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138223.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1401100021421 its reverse (1241200011041), we get a palindrome (2642300032462).

The spelling of 1401100021421 in words is "one trillion, four hundred one billion, one hundred million, twenty-one thousand, four hundred twenty-one".