1022100000421 has 2 divisors, whose sum is σ = 1022100000422. Its totient is φ = 1022100000420.

The previous prime is 1022100000413. The next prime is 1022100000433. The reversal of 1022100000421 is 1240000012201.

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., 643765522500 + 378334477921 = 802350^2 + 615089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022100000421 - 2³ = 1022100000413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022100000491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511050000210 + 511050000211.

It is an arithmetic number, because the mean of its divisors is an integer number (511050000211).

Almost surely, 2^{1022100000421} is an apocalyptic number.

It is an amenable number.

1022100000421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022100000421 is an equidigital number, since it uses as much as digits as its factorization.

1022100000421 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 13.

Adding to 1022100000421 its reverse (1240000012201), we get a palindrome (2262100012622).

The spelling of 1022100000421 in words is "one trillion, twenty-two billion, one hundred million, four hundred twenty-one", and thus it is an aban number.