121222220021010 has 64 divisors (see below), whose sum is σ = 323771550600960. Its totient is φ = 32274695617920.

The previous prime is 121222220020981. The next prime is 121222220021029. The reversal of 121222220021010 is 10120022222121.

It is a happy number.

121222220021010 is a `hidden beast` number, since 1 + 2 + 1 + 222 + 220 + 0 + 210 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355591267 + ... + 355932006.

It is an arithmetic number, because the mean of its divisors is an integer number (5058930478140).

Almost surely, 2^{121222220021010} is an apocalyptic number.

121222220021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121222220021010 is an abundant number, since it is smaller than the sum of its proper divisors (202549330579950).

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

121222220021010 is a wasteful number, since it uses less digits than its factorization.

121222220021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711523920 (or 711523914 counting only the distinct ones).

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

Adding to 121222220021010 its reverse (10120022222121), we get a palindrome (131342242243131).

The spelling of 121222220021010 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, twenty-one thousand, ten".