1121210210021 has 32 divisors (see below), whose sum is σ = 1295686250496. Its totient is φ = 960681456000.

The previous prime is 1121210210017. The next prime is 1121210210027. The reversal of 1121210210021 is 1200120121211.

It is a cyclic number.

It is not a de Polignac number, because 1121210210021 - 2² = 1121210210017 is a prime.

It is a super-2 number, since 2×1121210210021² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1121210209978 and 1121210210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121210210027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4977881 + ... + 5198241.

It is an arithmetic number, because the mean of its divisors is an integer number (40490195328).

Almost surely, 2^{1121210210021} is an apocalyptic number.

1121210210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121210210021 is a deficient number, since it is larger than the sum of its proper divisors (174476040475).

1121210210021 is a wasteful number, since it uses less digits than its factorization.

1121210210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220793.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1121210210021 its reverse (1200120121211), we get a palindrome (2321330331232).

The spelling of 1121210210021 in words is "one trillion, one hundred twenty-one billion, two hundred ten million, two hundred ten thousand, twenty-one".