221002021011 has 16 divisors (see below), whose sum is σ = 317117658528. Its totient is φ = 136394688000.

The previous prime is 221002021007. The next prime is 221002021013. The reversal of 221002021011 is 110120200122.

It is not a de Polignac number, because 221002021011 - 2² = 221002021007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221002021013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35516340 + ... + 35522561.

It is an arithmetic number, because the mean of its divisors is an integer number (19819853658).

Almost surely, 2^221002021011 is an apocalyptic number.

221002021011 is a deficient number, since it is larger than the sum of its proper divisors (96115637517).

221002021011 is a wasteful number, since it uses less digits than its factorization.

221002021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71038982.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221002021011 its reverse (110120200122), we get a palindrome (331122221133).

The spelling of 221002021011 in words is "two hundred twenty-one billion, two million, twenty-one thousand, eleven".