1402400020021 has 16 divisors (see below), whose sum is σ = 1882942685568. Its totient is φ = 1008719294400.

The previous prime is 1402400019997. The next prime is 1402400020027. The reversal of 1402400020021 is 1200200042041.

It is a cyclic number.

It is not a de Polignac number, because 1402400020021 - 2¹⁹ = 1402399495733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1402400019977 and 1402400020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402400020027) 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, 700498510 + ... + 700500511.

It is an arithmetic number, because the mean of its divisors is an integer number (117683917848).

Almost surely, 2^{1402400020021} is an apocalyptic number.

1402400020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1402400020021 is a deficient number, since it is larger than the sum of its proper divisors (480542665547).

1402400020021 is a wasteful number, since it uses less digits than its factorization.

1402400020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400999052.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1402400020021 its reverse (1200200042041), we get a palindrome (2602600062062).

The spelling of 1402400020021 in words is "one trillion, four hundred two billion, four hundred million, twenty thousand, twenty-one".