221020001111002 has 4 divisors (see below), whose sum is σ = 331530001666506. Its totient is φ = 110510000555500.

The previous prime is 221020001110889. The next prime is 221020001111027. The reversal of 221020001111002 is 200111100020122.

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., 212703877465641 + 8316123645361 = 14584371^2 + 2883769^2 .

It is a super-2 number, since 2×221020001111002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255000277749 + ... + 55255000277752.

Almost surely, 2^{221020001111002} is an apocalyptic number.

221020001111002 is a deficient number, since it is larger than the sum of its proper divisors (110510000555504).

221020001111002 is a wasteful number, since it uses less digits than its factorization.

221020001111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110510000555503.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221020001111002 its reverse (200111100020122), we get a palindrome (421131101131124).

The spelling of 221020001111002 in words is "two hundred twenty-one trillion, twenty billion, one million, one hundred eleven thousand, two".