21201101222029 has 2 divisors, whose sum is σ = 21201101222030. Its totient is φ = 21201101222028.

The previous prime is 21201101221921. The next prime is 21201101222033. The reversal of 21201101222029 is 92022210110212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19850678268100 + 1350422953929 = 4455410^2 + 1162077^2 .

It is a cyclic number.

It is not a de Polignac number, because 21201101222029 - 2¹³ = 21201101213837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201101221994 and 21201101222012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201101222039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600550611014 + 10600550611015.

It is an arithmetic number, because the mean of its divisors is an integer number (10600550611015).

Almost surely, 2^{21201101222029} is an apocalyptic number.

It is an amenable number.

21201101222029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201101222029 is an equidigital number, since it uses as much as digits as its factorization.

21201101222029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 21201101222029 in words is "twenty-one trillion, two hundred one billion, one hundred one million, two hundred twenty-two thousand, twenty-nine".