21122123026 has 16 divisors (see below), whose sum is σ = 31807842048. Its totient is φ = 10519588800.

The previous prime is 21122123021. The next prime is 21122123027. The reversal of 21122123026 is 62032122112.

It is a happy number.

It is a super-2 number, since 2×21122123026² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122122988 and 21122123006.

It is not an unprimeable number, because it can be changed into a prime (21122123021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524506 + ... + 563338.

It is an arithmetic number, because the mean of its divisors is an integer number (1987990128).

Almost surely, 2^21122123026 is an apocalyptic number.

21122123026 is a deficient number, since it is larger than the sum of its proper divisors (10685719022).

21122123026 is a wasteful number, since it uses less digits than its factorization.

21122123026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39897.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21122123026 its reverse (62032122112), we get a palindrome (83154245138).

The spelling of 21122123026 in words is "twenty-one billion, one hundred twenty-two million, one hundred twenty-three thousand, twenty-six".