1202121001111 has 24 divisors (see below), whose sum is σ = 1219973443920. Its totient is φ = 1184496377856.

The previous prime is 1202121001073. The next prime is 1202121001177. The reversal of 1202121001111 is 1111001212021.

It is a happy number.

It is not a de Polignac number, because 1202121001111 - 2¹⁷ = 1202120870039 is a prime.

It is a super-2 number, since 2×1202121001111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202121001091 and 1202121001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202121001181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2869023660 + ... + 2869024078.

It is an arithmetic number, because the mean of its divisors is an integer number (50832226830).

Almost surely, 2^{1202121001111} is an apocalyptic number.

1202121001111 is a deficient number, since it is larger than the sum of its proper divisors (17852442809).

1202121001111 is an equidigital number, since it uses as much as digits as its factorization.

1202121001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1202121001111 its reverse (1111001212021), we get a palindrome (2313122213132).

The spelling of 1202121001111 in words is "one trillion, two hundred two billion, one hundred twenty-one million, one thousand, one hundred eleven".