29090912021 has 2 divisors, whose sum is σ = 29090912022. Its totient is φ = 29090912020.

The previous prime is 29090911963. The next prime is 29090912029. The reversal of 29090912021 is 12021909092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28550860900 + 540051121 = 168970^2 + 23239^2 .

It is a cyclic number.

It is not a de Polignac number, because 29090912021 - 2³⁴ = 11911042837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29090912029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14545456010 + 14545456011.

It is an arithmetic number, because the mean of its divisors is an integer number (14545456011).

Almost surely, 2^29090912021 is an apocalyptic number.

It is an amenable number.

29090912021 is a deficient number, since it is larger than the sum of its proper divisors (1).

29090912021 is an equidigital number, since it uses as much as digits as its factorization.

29090912021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 29090912021 in words is "twenty-nine billion, ninety million, nine hundred twelve thousand, twenty-one".