1000121356 has 48 divisors (see below), whose sum is σ = 2021120640. Its totient is φ = 428912640.

The previous prime is 1000121341. The next prime is 1000121357. The reversal of 1000121356 is 6531210001.

It is not an unprimeable number, because it can be changed into a prime (1000121357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62676 + ... + 76996.

It is an arithmetic number, because the mean of its divisors is an integer number (42106680).

Almost surely, 2^1000121356 is an apocalyptic number.

It is an amenable number.

1000121356 is an abundant number, since it is smaller than the sum of its proper divisors (1020999284).

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

1000121356 is a wasteful number, since it uses less digits than its factorization.

1000121356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14434 (or 14432 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1000121356 is about 31624.6953503113. The cubic root of 1000121356 is about 1000.0404503637.

Adding to 1000121356 its reverse (6531210001), we get a palindrome (7531331357).

The spelling of 1000121356 in words is "one billion, one hundred twenty-one thousand, three hundred fifty-six".