1121202121 has 16 divisors (see below), whose sum is σ = 1237239360. Its totient is φ = 1009644480.

The previous prime is 1121202073. The next prime is 1121202151. The reversal of 1121202121 is 1212021211.

It is not a de Polignac number, because 1121202121 - 2⁷ = 1121201993 is a prime.

It is a super-2 number, since 2×1121202121² = 2514188392269797282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121202151) 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, 118786 + ... + 127876.

It is an arithmetic number, because the mean of its divisors is an integer number (77327460).

Almost surely, 2^1121202121 is an apocalyptic number.

It is an amenable number.

1121202121 is a deficient number, since it is larger than the sum of its proper divisors (116037239).

1121202121 is a wasteful number, since it uses less digits than its factorization.

1121202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9336.

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

The square root of 1121202121 is about 33484.3563623373. The cubic root of 1121202121 is about 1038.8702355074.

Adding to 1121202121 its reverse (1212021211), we get a palindrome (2333223332).

The spelling of 1121202121 in words is "one billion, one hundred twenty-one million, two hundred two thousand, one hundred twenty-one".