29912201021 has 2 divisors, whose sum is σ = 29912201022. Its totient is φ = 29912201020.

The previous prime is 29912200993. The next prime is 29912201027. The reversal of 29912201021 is 12010221992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25782724900 + 4129476121 = 160570^2 + 64261^2 .

It is a cyclic number.

It is not a de Polignac number, because 29912201021 - 2¹⁴ = 29912184637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29912201027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14956100510 + 14956100511.

It is an arithmetic number, because the mean of its divisors is an integer number (14956100511).

Almost surely, 2^29912201021 is an apocalyptic number.

It is an amenable number.

29912201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

29912201021 is an equidigital number, since it uses as much as digits as its factorization.

29912201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 29912201021 in words is "twenty-nine billion, nine hundred twelve million, two hundred one thousand, twenty-one".