221001020021002 has 96 divisors (see below), whose sum is σ = 366912951240528. Its totient is φ = 99206514281472.

The previous prime is 221001020020967. The next prime is 221001020021051. The reversal of 221001020021002 is 200120020100122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 86782098807481 + 134218921213521 = 9315691^2 + 11585289^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30724453518 + ... + 30724460710.

Almost surely, 2^{221001020021002} is an apocalyptic number.

221001020021002 is a deficient number, since it is larger than the sum of its proper divisors (145911931219526).

221001020021002 is a wasteful number, since it uses less digits than its factorization.

221001020021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8152 (or 7793 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221001020021002 its reverse (200120020100122), we get a palindrome (421121040121124).

The spelling of 221001020021002 in words is "two hundred twenty-one trillion, one billion, twenty million, twenty-one thousand, two".