421220111221607 has 4 divisors (see below), whose sum is σ = 445997764822896. Its totient is φ = 396442457620320.

The previous prime is 421220111221597. The next prime is 421220111221627. The reversal of 421220111221607 is 706122111022124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421220111221607 - 2²⁶ = 421220044112743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421220111221627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12388826800619 + ... + 12388826800652.

It is an arithmetic number, because the mean of its divisors is an integer number (111499441205724).

Almost surely, 2^{421220111221607} is an apocalyptic number.

421220111221607 is a deficient number, since it is larger than the sum of its proper divisors (24777653601289).

421220111221607 is a wasteful number, since it uses less digits than its factorization.

421220111221607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24777653601288.

The product of its (nonzero) digits is 5376, while the sum is 32.

The spelling of 421220111221607 in words is "four hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, six hundred seven".