2142021021 has 32 divisors (see below), whose sum is σ = 3343380480. Its totient is φ = 1194595776.

The previous prime is 2142021001. The next prime is 2142021059. The reversal of 2142021021 is 1201202412.

It is not a de Polignac number, because 2142021021 - 2⁶ = 2142020957 is a prime.

2142021021 is a modest number, since divided by 21021 gives 2142 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142021001) 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, 146380 + ... + 160346.

It is an arithmetic number, because the mean of its divisors is an integer number (104480640).

Almost surely, 2^2142021021 is an apocalyptic number.

2142021021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2142021021 is a deficient number, since it is larger than the sum of its proper divisors (1201359459).

2142021021 is a wasteful number, since it uses less digits than its factorization.

2142021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14153.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2142021021 is about 46281.9729592419. The cubic root of 2142021021 is about 1289.0642856794.

Adding to 2142021021 its reverse (1201202412), we get a palindrome (3343223433).

The spelling of 2142021021 in words is "two billion, one hundred forty-two million, twenty-one thousand, twenty-one".