222121102121020 has 48 divisors (see below), whose sum is σ = 467204479047936. Its totient is φ = 88705565696000.

The previous prime is 222121102120963. The next prime is 222121102121077. The reversal of 222121102121020 is 20121201121222.

It is an interprime number because it is at equal distance from previous prime (222121102120963) and next prime (222121102121077).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273185685 + ... + 273997555.

It is an arithmetic number, because the mean of its divisors is an integer number (9733426646832).

Almost surely, 2^{222121102121020} is an apocalyptic number.

222121102121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121102121020 is an abundant number, since it is smaller than the sum of its proper divisors (245083376926916).

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

222121102121020 is a wasteful number, since it uses less digits than its factorization.

222121102121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833862 (or 833860 counting only the distinct ones).

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

Adding to 222121102121020 its reverse (20121201121222), we get a palindrome (242242303242242).

The spelling of 222121102121020 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred two million, one hundred twenty-one thousand, twenty".