20032212121 has 16 divisors (see below), whose sum is σ = 21050265600. Its totient is φ = 19038070800.

The previous prime is 20032212103. The next prime is 20032212133. The reversal of 20032212121 is 12121223002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20032212121 - 2⁹ = 20032211609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20032212095 and 20032212104.

It is not an unprimeable number, because it can be changed into a prime (20032213121) 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, 1990420 + ... + 2000458.

It is an arithmetic number, because the mean of its divisors is an integer number (1315641600).

Almost surely, 2^20032212121 is an apocalyptic number.

It is an amenable number.

20032212121 is a deficient number, since it is larger than the sum of its proper divisors (1018053479).

20032212121 is a wasteful number, since it uses less digits than its factorization.

20032212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11220.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20032212121 its reverse (12121223002), we get a palindrome (32153435123).

The spelling of 20032212121 in words is "twenty billion, thirty-two million, two hundred twelve thousand, one hundred twenty-one".