20210021122 has 4 divisors (see below), whose sum is σ = 30315031686. Its totient is φ = 10105010560.

The previous prime is 20210021059. The next prime is 20210021131. The reversal of 20210021122 is 22112001202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22112001202 = 2 ⋅11056000601.

It can be written as a sum of positive squares in only one way, i.e., 20050276801 + 159744321 = 141599^2 + 12639^2 .

It is a super-2 number, since 2×20210021122² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052505279 + ... + 5052505282.

Almost surely, 2^20210021122 is an apocalyptic number.

20210021122 is a deficient number, since it is larger than the sum of its proper divisors (10105010564).

20210021122 is a wasteful number, since it uses less digits than its factorization.

20210021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105010563.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20210021122 its reverse (22112001202), we get a palindrome (42322022324).

The spelling of 20210021122 in words is "twenty billion, two hundred ten million, twenty-one thousand, one hundred twenty-two".