1020121201 has 8 divisors (see below), whose sum is σ = 1123261344. Its totient is φ = 918714720.

The previous prime is 1020121187. The next prime is 1020121213. The reversal of 1020121201 is 1021210201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020121201 - 2⁷ = 1020121073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020121241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432180 + ... + 434533.

It is an arithmetic number, because the mean of its divisors is an integer number (140407668).

Almost surely, 2^1020121201 is an apocalyptic number.

1020121201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020121201 is a deficient number, since it is larger than the sum of its proper divisors (103140143).

1020121201 is a wasteful number, since it uses less digits than its factorization.

1020121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866831.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1020121201 is about 31939.3362642369. The cubic root of 1020121201 is about 1006.6625784644.

Adding to 1020121201 its reverse (1021210201), we get a palindrome (2041331402).

It can be divided in two parts, 1020 and 121201, that added together give a palindrome (122221).

The spelling of 1020121201 in words is "one billion, twenty million, one hundred twenty-one thousand, two hundred one".