1202122121 has 4 divisors (see below), whose sum is σ = 1202256000. Its totient is φ = 1201988244.

The previous prime is 1202122111. The next prime is 1202122127. The reversal of 1202122121 is 1212212021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1212212021 = 22433 ⋅54037.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202122121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202122096 and 1202122105.

It is not an unprimeable number, because it can be changed into a prime (1202122127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52421 + ... + 71778.

It is an arithmetic number, because the mean of its divisors is an integer number (300564000).

Almost surely, 2^1202122121 is an apocalyptic number.

It is an amenable number.

1202122121 is a deficient number, since it is larger than the sum of its proper divisors (133879).

1202122121 is an equidigital number, since it uses as much as digits as its factorization.

1202122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133878.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1202122121 is about 34671.6327997399. The cubic root of 1202122121 is about 1063.2846141948.

Adding to 1202122121 its reverse (1212212021), we get a palindrome (2414334142).

The spelling of 1202122121 in words is "one billion, two hundred two million, one hundred twenty-two thousand, one hundred twenty-one".