1012121029 has 2 divisors, whose sum is σ = 1012121030. Its totient is φ = 1012121028.

The previous prime is 1012121023. The next prime is 1012121053. The reversal of 1012121029 is 9201212101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 930128004 + 81993025 = 30498^2 + 9055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012121029 - 2³ = 1012121021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012120997 and 1012121015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012121021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506060514 + 506060515.

It is an arithmetic number, because the mean of its divisors is an integer number (506060515).

Almost surely, 2^1012121029 is an apocalyptic number.

It is an amenable number.

1012121029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012121029 is an equidigital number, since it uses as much as digits as its factorization.

1012121029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1012121029 is about 31813.8496413119. The cubic root of 1012121029 is about 1004.0241276747.

The spelling of 1012121029 in words is "one billion, twelve million, one hundred twenty-one thousand, twenty-nine".