2220120101221 has 4 divisors (see below), whose sum is σ = 2421949201344. Its totient is φ = 2018291001100.

The previous prime is 2220120101219. The next prime is 2220120101233. The reversal of 2220120101221 is 1221010210222.

It is a happy number.

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 2220120101221 - 2¹ = 2220120101219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220120101195 and 2220120101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220120107221) 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, 100914550045 + ... + 100914550066.

It is an arithmetic number, because the mean of its divisors is an integer number (605487300336).

Almost surely, 2^{2220120101221} is an apocalyptic number.

It is an amenable number.

2220120101221 is a deficient number, since it is larger than the sum of its proper divisors (201829100123).

2220120101221 is a wasteful number, since it uses less digits than its factorization.

2220120101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201829100122.

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

Adding to 2220120101221 its reverse (1221010210222), we get a palindrome (3441130311443).

The spelling of 2220120101221 in words is "two trillion, two hundred twenty billion, one hundred twenty million, one hundred one thousand, two hundred twenty-one".