221202101011 has 4 divisors (see below), whose sum is σ = 224828365024. Its totient is φ = 217575837000.

The previous prime is 221202100997. The next prime is 221202101033. The reversal of 221202101011 is 110101202122.

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

It is not a de Polignac number, because 221202101011 - 2¹¹ = 221202098963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221202100982 and 221202101000.

It is not an unprimeable number, because it can be changed into a prime (221202101041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1813131915 + ... + 1813132036.

It is an arithmetic number, because the mean of its divisors is an integer number (56207091256).

Almost surely, 2^221202101011 is an apocalyptic number.

221202101011 is a deficient number, since it is larger than the sum of its proper divisors (3626264013).

221202101011 is an equidigital number, since it uses as much as digits as its factorization.

221202101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626264012.

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

Adding to 221202101011 its reverse (110101202122), we get a palindrome (331303303133).

The spelling of 221202101011 in words is "two hundred twenty-one billion, two hundred two million, one hundred one thousand, eleven".