1401000420021 has 16 divisors (see below), whose sum is σ = 1977940670400. Its totient is φ = 879033431808.

The previous prime is 1401000420013. The next prime is 1401000420037. The reversal of 1401000420021 is 1200240001041.

It is not a de Polignac number, because 1401000420021 - 2³ = 1401000420013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401000470021) 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, 1446390 + ... + 2212248.

It is an arithmetic number, because the mean of its divisors is an integer number (123621291900).

Almost surely, 2^{1401000420021} is an apocalyptic number.

It is an amenable number.

1401000420021 is a deficient number, since it is larger than the sum of its proper divisors (576940250379).

1401000420021 is a wasteful number, since it uses less digits than its factorization.

1401000420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801748.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1401000420021 its reverse (1200240001041), we get a palindrome (2601240421062).

The spelling of 1401000420021 in words is "one trillion, four hundred one billion, four hundred twenty thousand, twenty-one".