401012000210021 has 2 divisors, whose sum is σ = 401012000210022. Its totient is φ = 401012000210020.

The previous prime is 401012000209921. The next prime is 401012000210123. The reversal of 401012000210021 is 120012000210104.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263354929629796 + 137657070580225 = 16228214^2 + 11732735^2 .

It is a cyclic number.

It is not a de Polignac number, because 401012000210021 - 2¹⁰ = 401012000208997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 401012000209978 and 401012000210005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401012600210021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200506000105010 + 200506000105011.

It is an arithmetic number, because the mean of its divisors is an integer number (200506000105011).

Almost surely, 2^{401012000210021} is an apocalyptic number.

It is an amenable number.

401012000210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

401012000210021 is an equidigital number, since it uses as much as digits as its factorization.

401012000210021 is an evil number, because the sum of its binary digits is even.

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

Adding to 401012000210021 its reverse (120012000210104), we get a palindrome (521024000420125).

The spelling of 401012000210021 in words is "four hundred one trillion, twelve billion, two hundred ten thousand, twenty-one".