1210222221021 has 128 divisors (see below), whose sum is σ = 2087279953920. Its totient is φ = 684908006400.

The previous prime is 1210222220983. The next prime is 1210222221077. The reversal of 1210222221021 is 1201222220121.

It is a happy number.

1210222221021 is a `hidden beast` number, since 1 + 210 + 2 + 222 + 210 + 21 = 666.

It is not a de Polignac number, because 1210222221021 - 2³³ = 1201632286429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210222220985 and 1210222221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210222222021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 363319326 + ... + 363322656.

It is an arithmetic number, because the mean of its divisors is an integer number (16306874640).

Almost surely, 2^{1210222221021} is an apocalyptic number.

1210222221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210222221021 is a deficient number, since it is larger than the sum of its proper divisors (877057732899).

1210222221021 is a wasteful number, since it uses less digits than its factorization.

1210222221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912 (or 3906 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1210222221021 its reverse (1201222220121), we get a palindrome (2411444441142).

The spelling of 1210222221021 in words is "one trillion, two hundred ten billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty-one".