1121427929 has 2 divisors, whose sum is σ = 1121427930. Its totient is φ = 1121427928.

The previous prime is 1121427911. The next prime is 1121427959. The reversal of 1121427929 is 9297241211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597704704 + 523723225 = 24448^2 + 22885^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121427929 - 2²⁴ = 1104650713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121427892 and 1121427901.

It is not a weakly prime, because it can be changed into another prime (1121427959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560713964 + 560713965.

It is an arithmetic number, because the mean of its divisors is an integer number (560713965).

Almost surely, 2^1121427929 is an apocalyptic number.

It is an amenable number.

1121427929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121427929 is an equidigital number, since it uses as much as digits as its factorization.

1121427929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 1121427929 is about 33487.7280358044. The cubic root of 1121427929 is about 1038.9399729969.

The spelling of 1121427929 in words is "one billion, one hundred twenty-one million, four hundred twenty-seven thousand, nine hundred twenty-nine".