2211220102021 has 4 divisors (see below), whose sum is σ = 2527108688032. Its totient is φ = 1895331516012.

The previous prime is 2211220101971. The next prime is 2211220102033. The reversal of 2211220102021 is 1202010221122.

It is a happy number.

2211220102021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 2211220102021 - 2¹³ = 2211220093829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211220101986 and 2211220102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211220102061) 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, 157944292995 + ... + 157944293008.

It is an arithmetic number, because the mean of its divisors is an integer number (631777172008).

Almost surely, 2^{2211220102021} is an apocalyptic number.

It is an amenable number.

2211220102021 is a deficient number, since it is larger than the sum of its proper divisors (315888586011).

2211220102021 is an equidigital number, since it uses as much as digits as its factorization.

2211220102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315888586010.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2211220102021 its reverse (1202010221122), we get a palindrome (3413230323143).

The spelling of 2211220102021 in words is "two trillion, two hundred eleven billion, two hundred twenty million, one hundred two thousand, twenty-one".