1020101121 has 24 divisors (see below), whose sum is σ = 1645600320. Its totient is φ = 627752592.

The previous prime is 1020101119. The next prime is 1020101141. The reversal of 1020101121 is 1211010201.

It is a happy number.

It is not a de Polignac number, because 1020101121 - 2¹ = 1020101119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1020101141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158301 + ... + 164618.

It is an arithmetic number, because the mean of its divisors is an integer number (68566680).

Almost surely, 2^1020101121 is an apocalyptic number.

It is an amenable number.

1020101121 is a deficient number, since it is larger than the sum of its proper divisors (625499199).

1020101121 is an equidigital number, since it uses as much as digits as its factorization.

1020101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322947 (or 322935 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1020101121 is about 31939.0219167713. The cubic root of 1020101121 is about 1006.6559733939.

Adding to 1020101121 its reverse (1211010201), we get a palindrome (2231111322).

The spelling of 1020101121 in words is "one billion, twenty million, one hundred one thousand, one hundred twenty-one".