21021631701469 has 16 divisors (see below), whose sum is σ = 24363397783296. Its totient is φ = 17764540819200.

The previous prime is 21021631701461. The next prime is 21021631701503. The reversal of 21021631701469 is 96410713612012.

It is a happy number.

It is not a de Polignac number, because 21021631701469 - 2³ = 21021631701461 is a prime.

It is a super-2 number, since 2×21021631701469² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021631701461) 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, 49966149 + ... + 50385109.

It is an arithmetic number, because the mean of its divisors is an integer number (1522712361456).

Almost surely, 2^{21021631701469} is an apocalyptic number.

It is an amenable number.

21021631701469 is a deficient number, since it is larger than the sum of its proper divisors (3341766081827).

21021631701469 is a wasteful number, since it uses less digits than its factorization.

21021631701469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519996.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 21021631701469 in words is "twenty-one trillion, twenty-one billion, six hundred thirty-one million, seven hundred one thousand, four hundred sixty-nine".