1401110021 has 16 divisors (see below), whose sum is σ = 1475905536. Its totient is φ = 1327532976.

The previous prime is 1401110017. The next prime is 1401110041. The reversal of 1401110021 is 1200111041.

It is a cyclic number.

It is not a de Polignac number, because 1401110021 - 2² = 1401110017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401109984 and 1401110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401110041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1885376 + ... + 1886118.

It is an arithmetic number, because the mean of its divisors is an integer number (92244096).

Almost surely, 2^1401110021 is an apocalyptic number.

It is an amenable number.

1401110021 is a deficient number, since it is larger than the sum of its proper divisors (74795515).

1401110021 is a wasteful number, since it uses less digits than its factorization.

1401110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1401110021 is about 37431.4042082314. The cubic root of 1401110021 is about 1118.9845230754.

Adding to 1401110021 its reverse (1200111041), we get a palindrome (2601221062).

The spelling of 1401110021 in words is "one billion, four hundred one million, one hundred ten thousand, twenty-one".