21106069007 has 16 divisors (see below), whose sum is σ = 23125318560. Its totient is φ = 19173654528.

The previous prime is 21106068961. The next prime is 21106069021. The reversal of 21106069007 is 70096060112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21106069007 - 2⁶ = 21106068943 is a prime.

It is a super-2 number, since 2×21106069007² (a number of 21 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 (21106069037) 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, 2888783 + ... + 2896079.

It is an arithmetic number, because the mean of its divisors is an integer number (1445332410).

Almost surely, 2^21106069007 is an apocalyptic number.

21106069007 is a deficient number, since it is larger than the sum of its proper divisors (2019249553).

21106069007 is a wasteful number, since it uses less digits than its factorization.

21106069007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13210.

The product of its (nonzero) digits is 4536, while the sum is 32.

The spelling of 21106069007 in words is "twenty-one billion, one hundred six million, sixty-nine thousand, seven".