1202111121 has 4 divisors (see below), whose sum is σ = 1602814832. Its totient is φ = 801407412.

The previous prime is 1202111117. The next prime is 1202111129. The reversal of 1202111121 is 1211112021.

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.

It is not a de Polignac number, because 1202111121 - 2² = 1202111117 is a prime.

It is a super-2 number, since 2×1202111121² = 2890142294463753282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202111097 and 1202111106.

It is not an unprimeable number, because it can be changed into a prime (1202111129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200351851 + ... + 200351856.

It is an arithmetic number, because the mean of its divisors is an integer number (400703708).

Almost surely, 2^1202111121 is an apocalyptic number.

It is an amenable number.

1202111121 is a deficient number, since it is larger than the sum of its proper divisors (400703711).

1202111121 is an equidigital number, since it uses as much as digits as its factorization.

1202111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400703710.

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

The square root of 1202111121 is about 34671.4741682554. The cubic root of 1202111121 is about 1063.2813709951.

Adding to 1202111121 its reverse (1211112021), we get a palindrome (2413223142).

The spelling of 1202111121 in words is "one billion, two hundred two million, one hundred eleven thousand, one hundred twenty-one".