21022001029 has 2 divisors, whose sum is σ = 21022001030. Its totient is φ = 21022001028.

The previous prime is 21022000903. The next prime is 21022001057. The reversal of 21022001029 is 92010022012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12077570404 + 8944430625 = 109898^2 + 94575^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022001029 - 2¹³ = 21021992837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21022000997 and 21022001015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022001059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511000514 + 10511000515.

It is an arithmetic number, because the mean of its divisors is an integer number (10511000515).

Almost surely, 2^21022001029 is an apocalyptic number.

It is an amenable number.

21022001029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022001029 is an equidigital number, since it uses as much as digits as its factorization.

21022001029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 21022001029 in words is "twenty-one billion, twenty-two million, one thousand, twenty-nine".