1011021121 has 8 divisors (see below), whose sum is σ = 1107880704. Its totient is φ = 914986320.

The previous prime is 1011021119. The next prime is 1011021149. The reversal of 1011021121 is 1211201101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011021121 - 2¹ = 1011021119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011021098 and 1011021107.

It is not an unprimeable number, because it can be changed into a prime (1011021821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203626 + ... + 208531.

It is an arithmetic number, because the mean of its divisors is an integer number (138485088).

Almost surely, 2^1011021121 is an apocalyptic number.

1011021121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011021121 is a deficient number, since it is larger than the sum of its proper divisors (96859583).

1011021121 is a wasteful number, since it uses less digits than its factorization.

1011021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412391.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1011021121 is about 31796.5583200446. The cubic root of 1011021121 is about 1003.6602929093.

Adding to 1011021121 its reverse (1211201101), we get a palindrome (2222222222).

The spelling of 1011021121 in words is "one billion, eleven million, twenty-one thousand, one hundred twenty-one".