1021022121 has 16 divisors (see below), whose sum is σ = 1557360000. Its totient is φ = 582872448.

The previous prime is 1021022117. The next prime is 1021022131. The reversal of 1021022121 is 1212201201.

It is not a de Polignac number, because 1021022121 - 2² = 1021022117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021022097 and 1021022106.

It is not an unprimeable number, because it can be changed into a prime (1021022131) 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, 1146 + ... + 45203.

It is an arithmetic number, because the mean of its divisors is an integer number (97335000).

Almost surely, 2^1021022121 is an apocalyptic number.

It is an amenable number.

1021022121 is a deficient number, since it is larger than the sum of its proper divisors (536337879).

1021022121 is a wasteful number, since it uses less digits than its factorization.

1021022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47408.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1021022121 is about 31953.4367635158. The cubic root of 1021022121 is about 1006.9588359409.

Adding to 1021022121 its reverse (1212201201), we get a palindrome (2233223322).

The spelling of 1021022121 in words is "one billion, twenty-one million, twenty-two thousand, one hundred twenty-one".