1021210121110 has 16 divisors (see below), whose sum is σ = 1856024610336. Its totient is φ = 404518183488.

The previous prime is 1021210121053. The next prime is 1021210121111. The reversal of 1021210121110 is 111210121201.

It is a happy number.

It is a super-2 number, since 2×1021210121110² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021210121111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495732039 + ... + 495734098.

It is an arithmetic number, because the mean of its divisors is an integer number (116001538146).

Almost surely, 2^{1021210121110} is an apocalyptic number.

1021210121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021210121110 is a deficient number, since it is larger than the sum of its proper divisors (834814489226).

1021210121110 is a wasteful number, since it uses less digits than its factorization.

1021210121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991466247.

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

Adding to 1021210121110 its reverse (111210121201), we get a palindrome (1132420242311).

Subtracting from 1021210121110 its reverse (111210121201), we obtain a palindrome (909999999909).

The spelling of 1021210121110 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred twenty-one thousand, one hundred ten".