1020220220121 has 8 divisors (see below), whose sum is σ = 1431888028320. Its totient is φ = 644349612672.

The previous prime is 1020220220093. The next prime is 1020220220137. The reversal of 1020220220121 is 1210220220201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020220220121 - 2²⁷ = 1020086002393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020220220121.

It is not an unprimeable number, because it can be changed into a prime (1020220220161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8949300120 + ... + 8949300233.

It is an arithmetic number, because the mean of its divisors is an integer number (178986003540).

Almost surely, 2^{1020220220121} is an apocalyptic number.

It is an amenable number.

1020220220121 is a deficient number, since it is larger than the sum of its proper divisors (411667808199).

1020220220121 is a wasteful number, since it uses less digits than its factorization.

1020220220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17898600375.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1020220220121 its reverse (1210220220201), we get a palindrome (2230440440322).

The spelling of 1020220220121 in words is "one trillion, twenty billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-one".