1021240101 has 32 divisors (see below), whose sum is σ = 1664972800. Its totient is φ = 543775680.

The previous prime is 1021240091. The next prime is 1021240109. The reversal of 1021240101 is 1010421201.

It is a happy number.

It is not a de Polignac number, because 1021240101 - 2²⁷ = 887022373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021240109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3360 + ... + 45318.

It is an arithmetic number, because the mean of its divisors is an integer number (52030400).

Almost surely, 2^1021240101 is an apocalyptic number.

It is an amenable number.

1021240101 is a deficient number, since it is larger than the sum of its proper divisors (643732699).

1021240101 is a wasteful number, since it uses less digits than its factorization.

1021240101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42049.

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

The square root of 1021240101 is about 31956.8474821907. The cubic root of 1021240101 is about 1007.0304900426.

Adding to 1021240101 its reverse (1010421201), we get a palindrome (2031661302).

The spelling of 1021240101 in words is "one billion, twenty-one million, two hundred forty thousand, one hundred one".