1022431400021 has 2 divisors, whose sum is σ = 1022431400022. Its totient is φ = 1022431400020.

The previous prime is 1022431399937. The next prime is 1022431400033. The reversal of 1022431400021 is 1200041342201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525314745796 + 497116654225 = 724786^2 + 705065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022431400021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1022431399966 and 1022431400002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022431406021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511215700010 + 511215700011.

It is an arithmetic number, because the mean of its divisors is an integer number (511215700011).

Almost surely, 2^{1022431400021} is an apocalyptic number.

It is an amenable number.

1022431400021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022431400021 is an equidigital number, since it uses as much as digits as its factorization.

1022431400021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1022431400021 its reverse (1200041342201), we get a palindrome (2222472742222).

The spelling of 1022431400021 in words is "one trillion, twenty-two billion, four hundred thirty-one million, four hundred thousand, twenty-one".