221022031001 has 8 divisors (see below), whose sum is σ = 223027513800. Its totient is φ = 219017417472.

The previous prime is 221022030991. The next prime is 221022031003. The reversal of 221022031001 is 100130220122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12126414400 + 208895616601 = 110120^2 + 457051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221022031001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221022031003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299051 + ... + 729023.

It is an arithmetic number, because the mean of its divisors is an integer number (27878439225).

Almost surely, 2^221022031001 is an apocalyptic number.

It is an amenable number.

221022031001 is a deficient number, since it is larger than the sum of its proper divisors (2005482799).

221022031001 is a wasteful number, since it uses less digits than its factorization.

221022031001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434635.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 221022031001 its reverse (100130220122), we get a palindrome (321152251123).

The spelling of 221022031001 in words is "two hundred twenty-one billion, twenty-two million, thirty-one thousand, one".