21220102011029 has 2 divisors, whose sum is σ = 21220102011030. Its totient is φ = 21220102011028.

The previous prime is 21220102010957. The next prime is 21220102011131. The reversal of 21220102011029 is 92011020102212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19771273320100 + 1448828690929 = 4446490^2 + 1203673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220102011029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21220102010995 and 21220102011013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220102013029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610051005514 + 10610051005515.

It is an arithmetic number, because the mean of its divisors is an integer number (10610051005515).

Almost surely, 2^{21220102011029} is an apocalyptic number.

It is an amenable number.

21220102011029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220102011029 is an equidigital number, since it uses as much as digits as its factorization.

21220102011029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21220102011029 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, eleven thousand, twenty-nine".