221012121002022 has 64 divisors (see below), whose sum is σ = 566267887042560. Its totient is φ = 62587503280512.

The previous prime is 221012121001963. The next prime is 221012121002047. The reversal of 221012121002022 is 220200121210122.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 221012121001986 and 221012121002004.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2587072998 + ... + 2587158425.

It is an arithmetic number, because the mean of its divisors is an integer number (8847935735040).

Almost surely, 2^{221012121002022} is an apocalyptic number.

221012121002022 is an abundant number, since it is smaller than the sum of its proper divisors (345255766040538).

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

221012121002022 is a wasteful number, since it uses less digits than its factorization.

221012121002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174231554 (or 5174231548 counting only the distinct ones).

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

Adding to 221012121002022 its reverse (220200121210122), we get a palindrome (441212242212144).

The spelling of 221012121002022 in words is "two hundred twenty-one trillion, twelve billion, one hundred twenty-one million, two thousand, twenty-two".