1012020122221 has 4 divisors (see below), whose sum is σ = 1065284339200. Its totient is φ = 958755905244.

The previous prime is 1012020122219. The next prime is 1012020122251. The reversal of 1012020122221 is 1222210202101.

It is a happy number.

1012020122221 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 1012020122221 - 2¹ = 1012020122219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012020122195 and 1012020122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012020122251) 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, 26632108461 + ... + 26632108498.

It is an arithmetic number, because the mean of its divisors is an integer number (266321084800).

Almost surely, 2^{1012020122221} is an apocalyptic number.

It is an amenable number.

1012020122221 is a deficient number, since it is larger than the sum of its proper divisors (53264216979).

1012020122221 is an equidigital number, since it uses as much as digits as its factorization.

1012020122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53264216978.

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

Adding to 1012020122221 its reverse (1222210202101), we get a palindrome (2234230324322).

The spelling of 1012020122221 in words is "one trillion, twelve billion, twenty million, one hundred twenty-two thousand, two hundred twenty-one".