1020123222021 has 24 divisors (see below), whose sum is σ = 1488298289400. Its totient is φ = 673259184000.

The previous prime is 1020123222017. The next prime is 1020123222071. The reversal of 1020123222021 is 1202223210201.

1020123222021 is a `hidden beast` number, since 10 + 201 + 232 + 220 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 565158132900 + 454965089121 = 751770^2 + 674511^2 .

It is not a de Polignac number, because 1020123222021 - 2² = 1020123222017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020123221985 and 1020123222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020123222071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7155051 + ... + 7296231.

It is an arithmetic number, because the mean of its divisors is an integer number (62012428725).

Almost surely, 2^{1020123222021} is an apocalyptic number.

It is an amenable number.

1020123222021 is a deficient number, since it is larger than the sum of its proper divisors (468175067379).

1020123222021 is a wasteful number, since it uses less digits than its factorization.

1020123222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149237 (or 149234 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1020123222021 its reverse (1202223210201), we get a palindrome (2222346432222).

The spelling of 1020123222021 in words is "one trillion, twenty billion, one hundred twenty-three million, two hundred twenty-two thousand, twenty-one".