1400020100521 has 16 divisors (see below), whose sum is σ = 1603276084224. Its totient is φ = 1197579208464.

The previous prime is 1400020100509. The next prime is 1400020100543. The reversal of 1400020100521 is 1250010200041.

It is a cyclic number.

It is not a de Polignac number, because 1400020100521 - 2²⁹ = 1399483229609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400020100495 and 1400020100504.

It is not an unprimeable number, because it can be changed into a prime (1400020100581) 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, 9359706 + ... + 9508108.

It is an arithmetic number, because the mean of its divisors is an integer number (100204755264).

Almost surely, 2^{1400020100521} is an apocalyptic number.

It is an amenable number.

1400020100521 is a deficient number, since it is larger than the sum of its proper divisors (203255983703).

1400020100521 is a wasteful number, since it uses less digits than its factorization.

1400020100521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151140.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 1400020100521 its reverse (1250010200041), we get a palindrome (2650030300562).

The spelling of 1400020100521 in words is "one trillion, four hundred billion, twenty million, one hundred thousand, five hundred twenty-one".