2211012221 has 8 divisors (see below), whose sum is σ = 2412353664. Its totient is φ = 2009727520.

The previous prime is 2211012203. The next prime is 2211012233. The reversal of 2211012221 is 1222101122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211012221 is a prime.

It is a super-2 number, since 2×2211012221² = 9777150082822705682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211012196 and 2211012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211012521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145820 + ... + 160266.

It is an arithmetic number, because the mean of its divisors is an integer number (301544208).

Almost surely, 2^2211012221 is an apocalyptic number.

It is an amenable number.

2211012221 is a deficient number, since it is larger than the sum of its proper divisors (201341443).

2211012221 is a wasteful number, since it uses less digits than its factorization.

2211012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28371.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2211012221 is about 47021.4017336787. The cubic root of 2211012221 is about 1302.7578967741.

Adding to 2211012221 its reverse (1222101122), we get a palindrome (3433113343).

It can be divided in two parts, 221101 and 2221, that added together give a palindrome (223322).

The spelling of 2211012221 in words is "two billion, two hundred eleven million, twelve thousand, two hundred twenty-one".