121221220022 has 16 divisors (see below), whose sum is σ = 207983793312. Its totient is φ = 51907954560.

The previous prime is 121221220019. The next prime is 121221220027. The reversal of 121221220022 is 220022122121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221220027) 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, 3649283 + ... + 3682350.

It is an arithmetic number, because the mean of its divisors is an integer number (12998987082).

Almost surely, 2^121221220022 is an apocalyptic number.

121221220022 is a deficient number, since it is larger than the sum of its proper divisors (86762573290).

121221220022 is a wasteful number, since it uses less digits than its factorization.

121221220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332823.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121221220022 its reverse (220022122121), we get a palindrome (341243342143).

The spelling of 121221220022 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty thousand, twenty-two".