1221021102022 has 16 divisors (see below), whose sum is σ = 1854085201920. Its totient is φ = 603035056008.

The previous prime is 1221021102017. The next prime is 1221021102029. The reversal of 1221021102022 is 2202011201221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221021101987 and 1221021102005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221021102029) 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, 10530822 + ... + 10646137.

It is an arithmetic number, because the mean of its divisors is an integer number (115880325120).

Almost surely, 2^{1221021102022} is an apocalyptic number.

1221021102022 is a deficient number, since it is larger than the sum of its proper divisors (633064099898).

1221021102022 is a wasteful number, since it uses less digits than its factorization.

1221021102022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21177315.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221021102022 its reverse (2202011201221), we get a palindrome (3423032303243).

The spelling of 1221021102022 in words is "one trillion, two hundred twenty-one billion, twenty-one million, one hundred two thousand, twenty-two".