1012121121 has 16 divisors (see below), whose sum is σ = 1508084928. Its totient is φ = 598444800.

The previous prime is 1012121113. The next prime is 1012121137. The reversal of 1012121121 is 1211212101.

It is not a de Polignac number, because 1012121121 - 2³ = 1012121113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012121097 and 1012121106.

It is not an unprimeable number, because it can be changed into a prime (1012121191) 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, 372676 + ... + 375381.

It is an arithmetic number, because the mean of its divisors is an integer number (94255308).

Almost surely, 2^1012121121 is an apocalyptic number.

1012121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012121121 is a deficient number, since it is larger than the sum of its proper divisors (495963807).

1012121121 is a wasteful number, since it uses less digits than its factorization.

1012121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748112.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1012121121 is about 31813.8510872230. The cubic root of 1012121121 is about 1004.0241580961.

Adding to 1012121121 its reverse (1211212101), we get a palindrome (2223333222).

The spelling of 1012121121 in words is "one billion, twelve million, one hundred twenty-one thousand, one hundred twenty-one".