1221701607 has 48 divisors (see below), whose sum is σ = 2042314560. Its totient is φ = 689342976.

The previous prime is 1221701581. The next prime is 1221701627. The reversal of 1221701607 is 7061071221.

It is not a de Polignac number, because 1221701607 - 2⁶ = 1221701543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221701627) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2146819 + ... + 2147387.

It is an arithmetic number, because the mean of its divisors is an integer number (42548220).

Almost surely, 2^1221701607 is an apocalyptic number.

1221701607 is a deficient number, since it is larger than the sum of its proper divisors (820612953).

1221701607 is a wasteful number, since it uses less digits than its factorization.

1221701607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 1221701607 is about 34952.8483388693. The cubic root of 1221701607 is about 1069.0262801481.

Adding to 1221701607 its reverse (7061071221), we get a palindrome (8282772828).

The spelling of 1221701607 in words is "one billion, two hundred twenty-one million, seven hundred one thousand, six hundred seven".