1020112022021 has 4 divisors (see below), whose sum is σ = 1021765364652. Its totient is φ = 1018458679392.

The previous prime is 1020112021991. The next prime is 1020112022077. The reversal of 1020112022021 is 1202202110201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63813832996 + 956298189025 = 252614^2 + 977905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020112022021 - 2²⁶ = 1020044913157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020112021987 and 1020112022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020112022521) 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, 826670390 + ... + 826671623.

It is an arithmetic number, because the mean of its divisors is an integer number (255441341163).

Almost surely, 2^{1020112022021} is an apocalyptic number.

It is an amenable number.

1020112022021 is a deficient number, since it is larger than the sum of its proper divisors (1653342631).

1020112022021 is an equidigital number, since it uses as much as digits as its factorization.

1020112022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653342630.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1020112022021 its reverse (1202202110201), we get a palindrome (2222314132222).

It can be divided in two parts, 10201 and 12022021, that multiplied together give a palindrome (122636636221).

The spelling of 1020112022021 in words is "one trillion, twenty billion, one hundred twelve million, twenty-two thousand, twenty-one".