1122012121 has 8 divisors (see below), whose sum is σ = 1194046920. Its totient is φ = 1050647808.

The previous prime is 1122012113. The next prime is 1122012127. The reversal of 1122012121 is 1212102211.

It can be written as a sum of positive squares in 4 ways, for example, as 487526400 + 634485721 = 22080^2 + 25189^2 .

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 1122012121 - 2³ = 1122012113 is a prime.

It is a super-2 number, since 2×1122012121² = 2517822399341837282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122012127) 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, 164166 + ... + 170863.

It is an arithmetic number, because the mean of its divisors is an integer number (149255865).

Almost surely, 2^1122012121 is an apocalyptic number.

It is an amenable number.

1122012121 is a deficient number, since it is larger than the sum of its proper divisors (72034799).

1122012121 is a wasteful number, since it uses less digits than its factorization.

1122012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335243.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1122012121 is about 33496.4493790014. The cubic root of 1122012121 is about 1039.1203487016.

Adding to 1122012121 its reverse (1212102211), we get a palindrome (2334114332).

The spelling of 1122012121 in words is "one billion, one hundred twenty-two million, twelve thousand, one hundred twenty-one".