1210021118228 has 48 divisors (see below), whose sum is σ = 2504814049920. Its totient is φ = 506074656384.

The previous prime is 1210021118219. The next prime is 1210021118249. The reversal of 1210021118228 is 8228111200121.

It is a super-2 number, since 2×1210021118228² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1210021118228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26601575 + ... + 26647022.

It is an arithmetic number, because the mean of its divisors is an integer number (52183626040).

Almost surely, 2^{1210021118228} is an apocalyptic number.

It is an amenable number.

1210021118228 is an abundant number, since it is smaller than the sum of its proper divisors (1294792931692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1210021118228 is a wasteful number, since it uses less digits than its factorization.

1210021118228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53248656 (or 53248654 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 29.

Adding to 1210021118228 its reverse (8228111200121), we get a palindrome (9438132318349).

The spelling of 1210021118228 in words is "one trillion, two hundred ten billion, twenty-one million, one hundred eighteen thousand, two hundred twenty-eight".