1221122121022 has 8 divisors (see below), whose sum is σ = 1890769735872. Its totient is φ = 590865542400.

The previous prime is 1221122120987. The next prime is 1221122121029. The reversal of 1221122121022 is 2201212211221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221122121022² (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 (1221122121029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9847758979 + ... + 9847759102.

It is an arithmetic number, because the mean of its divisors is an integer number (236346216984).

Almost surely, 2^{1221122121022} is an apocalyptic number.

1221122121022 is a deficient number, since it is larger than the sum of its proper divisors (669647614850).

1221122121022 is a wasteful number, since it uses less digits than its factorization.

1221122121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19695518114.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1221122121022 its reverse (2201212211221), we get a palindrome (3422334332243).

The spelling of 1221122121022 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, twenty-two".