4021311021 has 16 divisors (see below), whose sum is σ = 6599074944. Its totient is φ = 2121130944.

The previous prime is 4021311017. The next prime is 4021311043. The reversal of 4021311021 is 1201131204.

It is not a de Polignac number, because 4021311021 - 2² = 4021311017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021311001) 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, 7364766 + ... + 7365311.

It is an arithmetic number, because the mean of its divisors is an integer number (412442184).

Almost surely, 2^4021311021 is an apocalyptic number.

It is an amenable number.

4021311021 is a deficient number, since it is larger than the sum of its proper divisors (2577763923).

4021311021 is a wasteful number, since it uses less digits than its factorization.

4021311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14730100.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 4021311021 is about 63413.8078102869. The cubic root of 4021311021 is about 1590.2151550148.

Adding to 4021311021 its reverse (1201131204), we get a palindrome (5222442225).

The spelling of 4021311021 in words is "four billion, twenty-one million, three hundred eleven thousand, twenty-one".