222121102211010 has 48 divisors (see below), whose sum is σ = 593123375642616. Its totient is φ = 57631421113344.

The previous prime is 222121102210999. The next prime is 222121102211053. The reversal of 222121102211010 is 10112201121222.

222121102211010 is a `hidden beast` number, since 2 + 221 + 211 + 0 + 221 + 1 + 0 + 10 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 222100690659849 + 20411551161 = 14903043^2 + 142869^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33351513519 + ... + 33351520178.

Almost surely, 2^{222121102211010} is an apocalyptic number.

222121102211010 is an abundant number, since it is smaller than the sum of its proper divisors (371002273431606).

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

222121102211010 is a wasteful number, since it uses less digits than its factorization.

222121102211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66703033747 (or 66703033744 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 222121102211010 its reverse (10112201121222), we get a palindrome (232233303332232).

The spelling of 222121102211010 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred two million, two hundred eleven thousand, ten".