221001111122002 has 4 divisors (see below), whose sum is σ = 331501666683006. Its totient is φ = 110500555561000.

The previous prime is 221001111121969. The next prime is 221001111122009. The reversal of 221001111122002 is 200221111100122.

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

It can be written as a sum of positive squares in only one way, i.e., 128050475451721 + 92950635670281 = 11315939^2 + 9641091^2 .

It is a super-2 number, since 2×221001111122002² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221001111122009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55250277780499 + ... + 55250277780502.

Almost surely, 2^{221001111122002} is an apocalyptic number.

221001111122002 is a deficient number, since it is larger than the sum of its proper divisors (110500555561004).

221001111122002 is a wasteful number, since it uses less digits than its factorization.

221001111122002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110500555561003.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221001111122002 its reverse (200221111100122), we get a palindrome (421222222222124).

The spelling of 221001111122002 in words is "two hundred twenty-one trillion, one billion, one hundred eleven million, one hundred twenty-two thousand, two".