21211001007 has 16 divisors (see below), whose sum is σ = 32710944000. Its totient is φ = 11974540032.

The previous prime is 21211000973. The next prime is 21211001027. The reversal of 21211001007 is 70010011212.

It is not a de Polignac number, because 21211001007 - 2⁷ = 21211000879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211001027) 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, 6082882 + ... + 6086367.

It is an arithmetic number, because the mean of its divisors is an integer number (2044434000).

Almost surely, 2^21211001007 is an apocalyptic number.

21211001007 is a deficient number, since it is larger than the sum of its proper divisors (11499942993).

21211001007 is a wasteful number, since it uses less digits than its factorization.

21211001007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12169342.

The product of its (nonzero) digits is 28, while the sum is 15.

Adding to 21211001007 its reverse (70010011212), we get a palindrome (91221012219).

The spelling of 21211001007 in words is "twenty-one billion, two hundred eleven million, one thousand, seven".