1021229136 has 60 divisors (see below), whose sum is σ = 2862613780. Its totient is φ = 339863040.

The previous prime is 1021229101. The next prime is 1021229149. The reversal of 1021229136 is 6319221201.

It can be written as a sum of positive squares in 2 ways, for example, as 787139136 + 234090000 = 28056^2 + 15300^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89820 + ... + 100548.

Almost surely, 2^1021229136 is an apocalyptic number.

1021229136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1021229136 is an abundant number, since it is smaller than the sum of its proper divisors (1841384644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021229136 is a wasteful number, since it uses less digits than its factorization.

1021229136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11404 (or 11395 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1021229136 is about 31956.6759222545. The cubic root of 1021229136 is about 1007.0268858856.

The spelling of 1021229136 in words is "one billion, twenty-one million, two hundred twenty-nine thousand, one hundred thirty-six".