1021222210121 has 16 divisors (see below), whose sum is σ = 1100350500480. Its totient is φ = 944232910080.

The previous prime is 1021222210081. The next prime is 1021222210147. The reversal of 1021222210121 is 1210122221201.

1021222210121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1021222210121 - 2¹⁴ = 1021222193737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021222210121.

It is not an unprimeable number, because it can be changed into a prime (1021222270121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1178615 + ... + 1852451.

It is an arithmetic number, because the mean of its divisors is an integer number (68771906280).

Almost surely, 2^{1021222210121} is an apocalyptic number.

It is an amenable number.

1021222210121 is a deficient number, since it is larger than the sum of its proper divisors (79128290359).

1021222210121 is a wasteful number, since it uses less digits than its factorization.

1021222210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675424.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1021222210121 its reverse (1210122221201), we get a palindrome (2231344431322).

The spelling of 1021222210121 in words is "one trillion, twenty-one billion, two hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".