21167051007 has 8 divisors (see below), whose sum is σ = 29133145600. Its totient is φ = 13656161880.

The previous prime is 21167050991. The next prime is 21167051027. The reversal of 21167051007 is 70015076112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21167051007 - 2⁴ = 21167050991 is a prime.

It is a super-3 number, since 3×21167051007³ (a number of 32 digits) contains 333 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 (21167051027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113801257 + ... + 113801442.

It is an arithmetic number, because the mean of its divisors is an integer number (3641643200).

Almost surely, 2^21167051007 is an apocalyptic number.

21167051007 is a deficient number, since it is larger than the sum of its proper divisors (7966094593).

21167051007 is a wasteful number, since it uses less digits than its factorization.

21167051007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227602733.

The product of its (nonzero) digits is 2940, while the sum is 30.

The spelling of 21167051007 in words is "twenty-one billion, one hundred sixty-seven million, fifty-one thousand, seven".