21122411740 has 12 divisors (see below), whose sum is σ = 44357064696. Its totient is φ = 8448964688.

The previous prime is 21122411731. The next prime is 21122411803. The reversal of 21122411740 is 4711422112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528060274 + ... + 528060313.

It is an arithmetic number, because the mean of its divisors is an integer number (3696422058).

Almost surely, 2^21122411740 is an apocalyptic number.

21122411740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122411740 is an abundant number, since it is smaller than the sum of its proper divisors (23234652956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122411740 is a wasteful number, since it uses less digits than its factorization.

21122411740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056120596 (or 1056120594 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 21122411740 its reverse (4711422112), we get a palindrome (25833833852).

The spelling of 21122411740 in words is "twenty-one billion, one hundred twenty-two million, four hundred eleven thousand, seven hundred forty".