21402141501 has 16 divisors (see below), whose sum is σ = 30747757824. Its totient is φ = 13163486784.

The previous prime is 21402141463. The next prime is 21402141559. The reversal of 21402141501 is 10514120412.

It is not a de Polignac number, because 21402141501 - 2⁷ = 21402141373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402141581) 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, 72981 + ... + 219386.

It is an arithmetic number, because the mean of its divisors is an integer number (1921734864).

Almost surely, 2^21402141501 is an apocalyptic number.

It is an amenable number.

21402141501 is a deficient number, since it is larger than the sum of its proper divisors (9345616323).

21402141501 is a wasteful number, since it uses less digits than its factorization.

21402141501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294260.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 21402141501 its reverse (10514120412), we get a palindrome (31916261913).

The spelling of 21402141501 in words is "twenty-one billion, four hundred two million, one hundred forty-one thousand, five hundred one".