123022020021 has 32 divisors (see below), whose sum is σ = 184258805760. Its totient is φ = 72551759616.

The previous prime is 123022020001. The next prime is 123022020031. The reversal of 123022020021 is 120020220321.

It is a happy number.

It is not a de Polignac number, because 123022020021 - 2⁶ = 123022019957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123022020001) 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, 376771 + ... + 622896.

It is an arithmetic number, because the mean of its divisors is an integer number (5758087680).

Almost surely, 2^123022020021 is an apocalyptic number.

It is an amenable number.

123022020021 is a deficient number, since it is larger than the sum of its proper divisors (61236785739).

123022020021 is a wasteful number, since it uses less digits than its factorization.

123022020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999833.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 123022020021 its reverse (120020220321), we get a palindrome (243042240342).

The spelling of 123022020021 in words is "one hundred twenty-three billion, twenty-two million, twenty thousand, twenty-one".