2211201021 has 4 divisors (see below), whose sum is σ = 2948268032. Its totient is φ = 1474134012.

The previous prime is 2211200987. The next prime is 2211201023. The reversal of 2211201021 is 1201021122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2211201021 - 2¹⁰ = 2211199997 is a prime.

It is a super-3 number, since 3×2211201021³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211200988 and 2211201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211201023) 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, 368533501 + ... + 368533506.

It is an arithmetic number, because the mean of its divisors is an integer number (737067008).

Almost surely, 2^2211201021 is an apocalyptic number.

It is an amenable number.

2211201021 is a deficient number, since it is larger than the sum of its proper divisors (737067011).

2211201021 is an equidigital number, since it uses as much as digits as its factorization.

2211201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737067010.

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

The square root of 2211201021 is about 47023.4092872901. The cubic root of 2211201021 is about 1302.7949768782.

Adding to 2211201021 its reverse (1201021122), we get a palindrome (3412222143).

The spelling of 2211201021 in words is "two billion, two hundred eleven million, two hundred one thousand, twenty-one".