21735251001 has 12 divisors (see below), whose sum is σ = 33047750320. Its totient is φ = 13727526840.

The previous prime is 21735250991. The next prime is 21735251023. The reversal of 21735251001 is 10015253712.

It is not a de Polignac number, because 21735251001 - 2⁵ = 21735250969 is a prime.

It is a super-2 number, since 2×21735251001² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21735251101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63553195 + ... + 63553536.

Almost surely, 2^21735251001 is an apocalyptic number.

It is an amenable number.

21735251001 is a deficient number, since it is larger than the sum of its proper divisors (11312499319).

21735251001 is a wasteful number, since it uses less digits than its factorization.

21735251001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127106756 (or 127106753 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The spelling of 21735251001 in words is "twenty-one billion, seven hundred thirty-five million, two hundred fifty-one thousand, one".