1220222220021 has 96 divisors (see below), whose sum is σ = 2085879264768. Its totient is φ = 673058211840.

The previous prime is 1220222219989. The next prime is 1220222220031. The reversal of 1220222220021 is 1200222220221.

1220222220021 is a `hidden beast` number, since 1 + 220 + 2 + 222 + 200 + 21 = 666.

It is not a de Polignac number, because 1220222220021 - 2⁵ = 1220222219989 is a prime.

It is a super-3 number, since 3×1220222220021³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220222219976 and 1220222220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220222220031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 44720835 + ... + 44748111.

It is an arithmetic number, because the mean of its divisors is an integer number (21727909008).

Almost surely, 2^{1220222220021} is an apocalyptic number.

It is an amenable number.

1220222220021 is a deficient number, since it is larger than the sum of its proper divisors (865657044747).

1220222220021 is a wasteful number, since it uses less digits than its factorization.

1220222220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27571 (or 27568 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1220222220021 its reverse (1200222220221), we get a palindrome (2420444440242).

The spelling of 1220222220021 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred twenty thousand, twenty-one".