20121121022202 has 32 divisors (see below), whose sum is σ = 45804177941760. Its totient is φ = 6543453990240.

The previous prime is 20121121022173. The next prime is 20121121022203. The reversal of 20121121022202 is 20222012112102.

It is a happy number.

20121121022202 is a `hidden beast` number, since 20 + 1 + 211 + 210 + 2 + 220 + 2 = 666.

It is a super-2 number, since 2×20121121022202² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20121121022203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4544063058 + ... + 4544067485.

It is an arithmetic number, because the mean of its divisors is an integer number (1431380560680).

Almost surely, 2^{20121121022202} is an apocalyptic number.

20121121022202 is an abundant number, since it is smaller than the sum of its proper divisors (25683056919558).

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

20121121022202 is a wasteful number, since it uses less digits than its factorization.

20121121022202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088130595 (or 9088130589 counting only the distinct ones).

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

Adding to 20121121022202 its reverse (20222012112102), we get a palindrome (40343133134304).

The spelling of 20121121022202 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, two hundred two".