21029372201 has 2 divisors, whose sum is σ = 21029372202. Its totient is φ = 21029372200.

The previous prime is 21029372149. The next prime is 21029372239. The reversal of 21029372201 is 10227392012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19467225625 + 1562146576 = 139525^2 + 39524^2 .

It is a cyclic number.

It is not a de Polignac number, because 21029372201 - 2¹⁴ = 21029355817 is a prime.

It is a super-3 number, since 3×21029372201³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21029372801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10514686100 + 10514686101.

It is an arithmetic number, because the mean of its divisors is an integer number (10514686101).

Almost surely, 2^21029372201 is an apocalyptic number.

It is an amenable number.

21029372201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21029372201 is an equidigital number, since it uses as much as digits as its factorization.

21029372201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The spelling of 21029372201 in words is "twenty-one billion, twenty-nine million, three hundred seventy-two thousand, two hundred one".