21122607 has 12 divisors (see below), whose sum is σ = 30957080. Its totient is φ = 12801360.

The previous prime is 21122603. The next prime is 21122611. The reversal of 21122607 is 70622112.

It is an interprime number because it is at equal distance from previous prime (21122603) and next prime (21122611).

It is not a de Polignac number, because 21122607 - 2² = 21122603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28732 + ... + 29457.

Almost surely, 2^21122607 is an apocalyptic number.

21122607 is a deficient number, since it is larger than the sum of its proper divisors (9834473).

21122607 is a wasteful number, since it uses less digits than its factorization.

21122607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58214 (or 58203 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 21122607 is about 4595.9337462588. The cubic root of 21122607 is about 276.4283021374.

Adding to 21122607 its reverse (70622112), we get a palindrome (91744719).

The spelling of 21122607 in words is "twenty-one million, one hundred twenty-two thousand, six hundred seven".