1000020022121 has 6 divisors (see below), whose sum is σ = 1033319337066. Its totient is φ = 967761310800.

The previous prime is 1000020022097. The next prime is 1000020022123. The reversal of 1000020022121 is 1212200200001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 966918222400 + 33101799721 = 983320^2 + 181939^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1000020022121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1000020022123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 520300820 + ... + 520302741.

It is an arithmetic number, because the mean of its divisors is an integer number (172219889511).

Almost surely, 2^{1000020022121} is an apocalyptic number.

It is an amenable number.

1000020022121 is a deficient number, since it is larger than the sum of its proper divisors (33299314945).

1000020022121 is an equidigital number, since it uses as much as digits as its factorization.

1000020022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040603623 (or 1040603592 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1000020022121 its reverse (1212200200001), we get a palindrome (2212220222122).

The spelling of 1000020022121 in words is "one trillion, twenty million, twenty-two thousand, one hundred twenty-one".